I've heard no such rumor personally. In the past it was always 4 people per spot, but you could usually get a 5th person in with one pass. I've heard of some people getting denied by assholes at the gate that enforce a 4 person rule as well. Not sure if you've been to the festival before, but don't try to hide a few extra people in the back of your RV if you're in premier. Everyone needs a premier wristband to get back into premier camping after leaving for the day.