I also experienced higher levels of exhaustion than usual, but I attributed that to the fact that the convention site was so huge. Even if you confined yourself to walking back and forth between the Hilton and the Convention Center (as I mostly did), you were pounding an awful lot of concrete everyday. The foot fatigue gets to you, after a while.

The Art Show's practice was not to check bags, but merely to ask to look inside people's bags as they were leaving. To my knowledge, they did not issue any warnings about not taking photos of the artworks and did not confiscate any cameras.