I may get flamed for this... But take a few quick pictures here and there... but then put it away. Live in the moment... watch the show through your eyes, and not through a tiny glowing LCD screen.
Or bring a non-fan friend/family member with you to be your camera man.
An interesting, albeit expensive, idea. So, it sounds like P&S are OK but larger cameras aren't. Not to worry, rlj1010, I'll probably bring a camera and then get so caught up in the moment of the show that I never pull it out and use it. (Hmmm, that sounds slightly pornographic.) I just don't want to get busted at the door and have to cruise back to parking to take a camera back.