Since you've learned that doing a short first appointment is a good thing, you should pick anyone that suits your fancy.  The review database here (and elsewhere) is a treasure trove of info.  I don't think you should let your physical stature limit you in who you can and cannot see.  It's not going to matter much when you're horizontal in bed.

To me, you're looking in the wrong place.  It sounds like you want a height appropriate date for a night/weekend and the main reason most of us are trolling the boards here is to look for a fun time (and probably one that is rather limited, mostly due to finances).  The women in this business aren't necessarily looking for long term relationships (and if they are, probably looking for sugardaddy that will give them financial security that most of us aren't capable of).  An overnight might cost $1000 + expenses (food, maybe entertainment/shopping) and a weekend might cost $3000 + expenses (and those numbers are probably on the low side) so it's definitely not cheap.  Not exactly whale sized but still a nice chunk of cash that I would guess most don't have to throw around (if they're looking here).  You might be wanting to look at the dating sites for your needs since that seems like what you're looking for.  Either that or treat someone closer to home that you have better chemistry with to a weekend in Vegas (which is about as close to what you want).

If you're really intent on finding the right person in Vegas, hit up all the height appropriate providers in Vegas and book a couple hours.  Should be long enough to figure out if there's enough chemistry there for an overnight or a weekend.

As for locations, it shouldn't matter.  Downtown isn't that bad although the Golden Nugget tends to be favored if you head that way.  Harrah's seems particularly bothersome on the strip.  I think the better the class of accommodations you choose will help set the mood.  Of course, it all depends on your needs during your stay in Vegas.  If you're looking to gamble a lot to improve the offers from the properties, that may factor into your choice of hotels (the more luxurious properties wanting more play).

Good luck,
 Bob

Seems to me there are very few gals who are going to snub a 3-hour date regardless of your location. (And very few gals who would agreed to an overnight on a first date anyway.)

Check out Christy, who's very petite and about 5' or so. (http://www.theeroticreview.com/reviews/show.asp?id=107914)

Looks like there are plenty to choose from