Any special way to make a reservation at Desert Trails?

Thanks, all, for the good information and suggestions. As timing would have it, I did get a call from Desert Trails just a little while ago. Perhaps they read this board... or perhaps not. In any case, the friendly person on the line advised that they are booked solid for the months of January and February. So, my search continues. I'm wide open as to location, so something between Tucson and Phoenix are definitely possibilities. Again, my thanks to you all.

... Bill