Coachella and Outdoor - main and second stages. Analogous to What and Which at Roo. Biggest stuff generally goes on these.
Sahara - big room EDM, some hip-hop and dance-associated acts
Yuma - techno/club tent. Line to get in.
Sonora - indie rock tent
They have other tents but those are the ones required for this draft.
This is a good summary. Sonora is recently introduced, and generally have smaller bands.
Mojave and Gobi are the other two tents - it will be required for this draft, as in they need to be part of the schedules. These two tents, Coachella & Outdoor are not particular genre-heavy, and they all have acts from variety of genres.