You beat me too it! That was exactly what I was going to say!
As far as what you need to bring....whatever you can think of! I know that's vague but there pretty much isn't a thing you can think off that someone might not need during rush. When I was a pi chi I even gave a girl my sandals one day when hers broke. I had to walk around with no shoes til lunch break!
It was really funny. Anyway...have fun!!