That's a good idea, I need to put that in my folder of morning websites again. Problem is that I'll probably find something much much much worse to spend money on!

A little up-date:
Looks like there might be some form of a shuttle service from the rafting lines to shore operating on Saturday. The mosh pit area is going to be relatively shallow closest to the stage so I am thinking a nice lawn chair that sits ideally in 2'-3' of water would probably be a better front row seat than a floating raft.
That would put you within approximately 30' of the front of the stage. I would obviously suggest some form of flotation past the 30' mark as the depths there range from 4' to 10'
Just a thought!