PSA: do not wear sandals at these things. Docs are hot and sweaty, yeah, but they don't peel the skin off your toes (TMI, but necessary to information to know). Seriously. Even Birkenstocks weren't comfortable.
People advised me against wearing metal jewelry but I didn't have any issues with it. I chose a cross body over a backpack because when you're in a big crowd it's easy for someone to steal something from a backpack.
I stayed at the J.W. Marriott with some friends and we took the shuttle. Because of this, we weren't able to go back and forth from the hotel to the event (it was about a 20 minute drive--not worth it). The nice thing about Lolla was that I stayed at a hotel within walking distance.
Mr. Kate's beauty marks last super long--I'm obsessed.