LOL this sounds like the morning of a huge race or sports competition. But I agree with the Pee schedule. I made the mistake last time of getting quite inebriated in line and then not realizing how badly I would have to go to the potty during the show. Rookie mistake.
There will be people camping out all day. I got to my last Muse show at around 5 pm and was already pretty far back, though I had a great view of the stage. I would say if you want to be at the very very front, be prepared to get there early afternoon if not earlier.