Hi Jennie. Clearly not Cathe or Chris so I cannot speak to the reason for one and not two RTs. But I can address the hotel room issue. The scenario you raise is exactly the reason you don't book your hotel room until AFTER you register for the RT. First you see if you get in, THEN you make your travel and hotel plans. And actually, we usually don't get all of the specific hotel info until after registration is complete.
Moreover, once registration is complete, many folks start looking for RT roomies, so a bunch of threads will be started then, based on who is a nightowl, early bird, clean, messy, smoker, non-smoker, quiet, loud, etc. The coordinators do a stellar job of giving guidelines for folks to hook up, and all the info you will need to book. Hope that helps a little.