Be sure to check out the Burner Express bus from Reno to the Playa, google the Green Tortoise (they run a bus from SF to the playa and have a camp with basics) and the 2013 Theme Camps thread. Several camps are still looking for people. Each camp is different, dues vary, as do the amenities. Choose carefully. Camps don't check "Introduce Yourself" very often, so you'll have to chase one down, but that's normal.
Tell them what you're good at, and why their camp specifically appeals to you.
You can also go alone if you're an experienced camper and like a challenge. I've camped "alone" before (neighbors a-plenty) but admittedly I had more than a month to prepare and several years' experience at the time.
Congratulations on your ticket, and welcome to the board!