Has anyone been to The Coachella Music Festival?

Just got an invite to go to the Coachella Music Festival with some friends that live out there. We already have tickets as they work for a sponsor and they have rooms booked at a hotel. I’ve never been, have you?
Can you give me any insight, advice, survival tactics? I understand that it’s crazy crowded; is it unbearable? I’m looking for any & all insight. I’ve been to the HFestival many times; is it similar?