The 'Ego Strip' is reserved for the headliner each day. The festival will modify the thrust each day based on the headliner's needs/request.
The crowd is small early on because of the logistics and reality of it. It's 100 degrees and dusty out there in the desert. If you're camping, you may wander in to the festival, but it's insanely hot and dusty and was really windy this year, so sandstorms etc. If you're not camping, it takes at least 90 minutes to drive or shuttle in, walk from the parking lot/shuttle drop off, and get through security checkpoints.