Eric, this is Tucson. The sprint is really just HTFU training.
As far as camping at the meet site - no facilities or water at all. There will be a fire and at least one keg of beer provided by Mark Parsons, and stove fuel provided by Max. What more could you need? ;-)
The closest town is Sonoita, a few miles further south on Highway 83. Check out
http://sonoitaaz.com for food and lodging options. The closest developed campgrounds are far up in Tucson or perhaps over in Sierra Vista to the east.