spur of the moment (or sperm of the moment as some wags have suggested?)

In my home city, I usually ask for appointments at least a week ahead. That way I usually get to see who I want to see.  
 When I travel, I usually arrange two or three weeks ahead. So I can arrange my schedule to fit the ladies.

The furthest I have planned out was 3 weeks when I saw a provider that I really wanted to see was coming to my city.  Only once has that not worked out for a visiting provider, but that was due to her not receiving enough requests in the city and canceling her visit.  Whenever I visit family at home in Texas I try to plan out as soon as I know the dates.  Last time didn't work out so well as I booked with a couple of ladies over a month in advance.  Really just depends on the providers professionalism I suppose.  I would prefer on a whim, but the selection is not so great in my neck of the woods.  

I need time to adjust my schedule to allow for it. I also want to know who might be touring. Once I decide on the who, then I will reach out to them.

Always my approach as I only hobby while on the road on business so would have my travel plans in place and align play time with work time.  Any attempts at spur of the moment are rare and have failed.

set all three appointments for the coming week.  Howevver, sometimes when I'm out of my office and have a short-notice schedule change, AND if I happen to be near one of the three places in LA where the incalls are clustered, I will check CV for a girl that is "available now."  Sometimes, "available now" means three hours from now, so it doesn't always work out.  

For booking with a weeks notice......   All providers appreciate at least a 24-48hrs advance notice, a lot do not realize there is a screening/verification process along with reference requests which not all providers/their assistants respond in minutes or even days... To speed up verification/screen it's always nice to have lots of reviews & white lists .....

The unexpected. I do like to plan a date in advance in terms of time and logistics but not the actual date itself. The last minute guys seem to cancel more often and expect you to bend over backwards to accommodate them.

Not only will you likely get your preferred time frame, it just makes it much easier for the girl. It takes time to screen snd prepare for a date with a new client. Even regulars, I always ask for at least a 24 hour notice. The sooner in advance you book, the better! Just please keep the appointment or if you need to cancel, try to do so as soon as you can. I've noticed my advanced bookings are more likely to have something come up, or their business trip to my city is suddenly "cancelled". Those are never fun.

You state your advanced bookings are the ones more likely to have something "come up", yet you state your preference for advanced bookings.  

It just always works out that way.  Because I am limited to setting aside $20 per week, I know quite a few months in advance when I'll be able to play again.  So by default, I wind up contacting a lady (or responding to one who's been chasing after me) at least a month in advance.

If it's a touring provider, I'll plan something as soon as she announces her tour dates.  For local providers I'll usually plan within a couple of days.  

But I understand that sometimes you can't always do that. My problem is that I don't do this full time  and don't live near where I do incall so I'm not really able to do booking without out a few hours notice. The thing that makes me frustrated is the people who basically want Uber... call for a woman at whatever time you want ride her to your next destination and then get off at the end. It's really not that easy to be available 24/7 even if this is your main job.

A few times a month at most - typically once a month.  I typically (not always..) see ladies on Saturdays during the day.

My schedule changes rapidly, so if I book more than a week ahead, I can all but guarantee it won't happen.  Usually I'm booking a few days ahead, or the next morning.  For a lady coming in from out of town, those I'll of course plan for that, but I just never know.  Thankfully I have a few ladies I see regularly enough that even same day can be an option.

but always leave room in my schedule for unexpected opportunities... if you know what I mean. 😎

I have to quite literally set aside "play days" in advance to have any hope of meeting our lovely ladies. How far in advance depends upon the volume of work coming in (and sometimes the lady's schedule if she is coming from out of town). Right now, I am busy as hell and just scheduled a date a month out. Usually, I plan a week or two ahead.

I can't remember exactly, but when I was in Texas, I had someone once book like 8 months in advance.  He saw me then scheduled the next date that far ahead because he knew that he was in town in say, January and Sept of each year.  He actually kept the appointment too!

I like to plan ahead by a few days but some ladies take it way too far, expecting you to book several months in advance. How do I know I'm going to be horny a few months from now (well, of course I'll be horny but maybe not horny enough to spend big $ on a high class lady).

Dates for when I land in Houston on the way to visit friends in family in Texas.

I can see a "normal" person booking a couple of weeks, or even a couple of months in advance if there is travel involved. Booking that far ahead for a local appointment just makes no sense to me.

...I am still new and the last minutes stuff if very limited for me. The last minute stuff I have done have not been the best experiences - and I am looking more for the experience rather than the romp.

When I'm headed to a different city I will submit appointment inquires well ahead . I'm pretty selective as to I see so I want to get on their calendar as soon as reasonably possible.

I don't tell you how to book, why should you presume to tell me?

She got confused on that  
   p implies q
   p therefore not q  
thing.

A last minute date is what you seek.
However, for a brief moment, put oneself
in our shoes....
I give priority and appreciation to guests  
whom plan in advance!  

You're a "low-volume" guy, do you mean the opposite of somebody like FatVern?

new girls for the first time.  Regulars, assuming you are a customer they like to spend time with, are much more dependable in respecting the schedule you have both agreed on.  

CV invented the "available now" icon for the ads.  A guy is driving down the road, looks down and sees he has boner, so he can go somewhere close by and get it taken care of.  Its sort of like a drive through car wash.

It is preferred for me and the provider as well.  

Had no idea my thoughts had such an impact on you. I was simply responding to the question posed by the OP.  

I don't mind last minute appointments.  If I'm not busy, and you are looking for company, great.  Except for the fact that I need to screen you and that does take time.
So I do welcome pre-screening.  That way I can verify you and you can request last minute in the near future.  

...like you, a week or so.

But riddle me this: if he's a total fraud, who the fuck was it I was hanging out with in a couple of notorious Costa Rican whorehouses?  And who in hell was it buying numerous shots of Patron in all those bars?  And what about that time in LV with those insanely hot hooker/strippers from Quebec?  Who the fuck was that?
Oh, right, I'm only a worthless alias so feel free to ignore everything I just said.  But, while you're at it, please take your head out of your ass.
I fucking hate defending the guy but I hate you more for making me do it.  You fucking fucker.  LOL!

I don't see any local women (nothing against local women, it's just something I haven't done, but I do plan to change soon) but touring ladies, as soon as I see a touring lady that I am interested in coming to DC, I'll schedule an appointment if I am free.

...so I ALWAYS plan ahead.  

😂😂 Though it is a hilarious thought,  
          (I'm not being facecious),
          this is exactly the ultimate reason
          I cannot procure last-minute meetings.

Thank you kindly Sir!

Advance planning is appreciated by the ladies, but I also hate scrambling at the last minute wondering whether it will work out.
I also like preparing myself mentally, building anticipation.   For me it makes a better experience if I think about her and desire her for a few days ahead of time.  

I have another job besides escorting, but even on my days off, I'm not all dolled up and ready to go at a moment's notice. When I'm not working, I like being comfortable and am often lounging around the house in sweats with no makeup on and my hair in a ponytail. lol Therefore, it takes me time to shower and get all prettied up. Not only that, but it could be that time of the month, I could have other plans, or I could be sick or tired. 24 hours in advance is always appreciated. It also gives me enough time to have your favorite beverage ready, music and outfits that you like, etc, which is hard to do with short notice.

Sometimes, though, if the window of opportunity is less...

Yes, I love advance notice as that gives me time to plan ahead and make sure I have nothing going on for that time slot the client wants. Plus, it is very courteous to do that as well. Just makes it easier especially if you have a reference and need to contact her to make sure the client is safe. Advance notice is the best. Last minute can be very difficult if the provider is busy or has other things going on. At times we can't drop everything just for a appointment. Although, I wish I could at times.

I like to plan ahead, most of the time one or two weeks but on a couple of occasions three months.  Both were with providers in my top three favorites.  One of them I knew was going to be touring in a city that is a little closer to me from where I normally see her,  The other is a special lady I only get to see once or twice a year in a city that is a long days drive for me or a plane ride.  I like to plan dinner dates with her well in advance because she is flirtatious and very feminine in public and an absolute tigress when its time for dessert.