And their future plans and obligations.. I'm a student, single no kids or other obligations so besides study time and family engagements, I'm somewhat flexible, although reasonable anticipation is greatly appreciated in order to get the screening process out of the way. Other ladies may not accommodate last minute requests due to a variety of factors. I would email a few ladies and see who is willing to commit to the exact date and time.

I like advance notice, even a week ahead or more if there is a special event a client wants a date for. I don't mind last minute appointments but it can be a but tricky if I have never met the client and need to get the screening done first

you should book as soon as she shows interest in coming to your area.  If she doesn't get enough advance bookings, she is likely to cancel.  Consider paying a deposit if she has an immaculate reputation for such things.

For a local gal, a few days up to a week in advance is enough.  It depends upon how busy she is, and whether you are looking for prime time or not.

.....at least day before is most preferred for me (I want to say for most as well) BUT if same day eh 2-3hrs notice at shortest notice can be doable too.

Personally I am not able to do things on a last minute basis because I am always booked...some ladies I am sure are more available and grateful for the horny man that calls right at the moment he is ready to explode