Yeah pictures and recording is fine. I think pictures in the Dealers room is okay, I saw a bunch of people taking pictures of Cosplay in there, even the people who worked there. Might not take pictures of the merchandise if I were you though, like I said, Im not sure.
As far as rooms to stay in, I wouldnt count on it in the hotel the conventions at, those Rooms are going going gone! And I'm not sure about other hotels. I know my friend, forum name Kaoru, is looking for room mates. Look in the forums for her. It should be labled, need a room?
Good luck in your search! And see you at the con!