The festival had a campsite too, which said "NO PILLS EXCEPT THOSE IN A PRESCRIPTION BOTTLE WITH MATCHING NAME" and about 100 other things they banned such as liquor. This being the first time I've been to an overnight rock fest, I obliged (other than taking some legal edibles).
I've never been more wrong in my life. The amount of hard liquor in the campground was astounding, and (no surprise) the amount of weed and plastic containers of alcohol snuck in was substantial, too.
They also banned moshing and crowdsurfing, per the signage around the festival. Almost every single band encouraged pits and crowdsurfing.