I'm very last minute in terms of setting up appointments....and usually get inspired late at night. Is it unrealistic to get an appointment with any of these high ranked girls late at night and on the fly?? If so, who would you recommend.

It's not impossible that you might be able to arrange a last-minute, late-night appointment with one of the well-reviewed independent providers, but it's not likely.  Tiffany, the provider who lives in my spare room, won't even answer her business phone after 10:00PM unless someone special has made prior arrangements.

One recommendation is to develop a good relationship with a reputable agency (that sounds like an oxymoron, but it isn't, necessarily).  Establish good relationships with several of the agency's ladies (that means tip them well), and then give the agency a call when your mood strikes.

Another avenue you might take is to arrange some pre-planned appointments with several of the well-reviewed ladies in whom you're interested, and establish a good relationship with them.  Then, after a few nice visits, approach them about their short-notice, late-night availability in your case.

with some ladies first ... and most likely will have a better chance doing an incall ... after that the agency route is about all that is left you'll be paying extra for your last minute want....

That's the way I am -- spontaneous, spur-of-the-moment --- when it comes time for scheduling an appointment.  It works for me because I have a some favorites that I give repeat business to, and I explain early on that it's how I operate.  If they're not available on a particular call, they just let me know and I move on to the next one on my list, and maybe we'll hookup again next time.

They are actually my favorites.  Nothing like the anticipation and thrill of a last minute rendevous.

Some ladies are willing to accomodate you.  Others are not.  Nearly all of the local agencies in my area are willing.