I'm traveling to LA in October. There are a few providers I'd like to see that are in LA.  How far in advance is reasonable to contact them?

P.S. I'm interested in "bimbo fetish" and superbusty providers, especially doubles.

I'll email 2 or 3 women I'm interested in, see who responds an is available.

You are looking for a very specific location and time.  Sometimes, rarely, I have arranged something 3 months in advance.  But I was looking for someone who would do incall in a specific location and time.  So I needed more time to find the right lady.  Of course, communication and occasional reconfirmation is even more important then so they don't forget or something.

If you are wanting to make sure they will be in town and available (of if they are thinkin of travelling then) go ahead an shoot them an email just letting them know your travel dates and hoping they will be available.

Then about 2 weeks before you travel date make the actual appointment. Booking too far in advanced can be a hassle; sometimes I'm not sure where I'll be a month or 2 from now!

Ladies who tour will most likely know whether or not they will be around within that timeframe, and booking early is always appreciated! I also agree with touching base again 2 weeks before the agreed upon date. Best of luck, have a great time!

It is never too far in advance, as long as you know that your plans are solid. It doesn't really make sense to inquire if there is a good chance that your plans will change.