I would get rid of the bag checks and provide a ticket (card) that doesn't demagnitize at the drop of a hat. To avoid the bag check lines, I carry a surf safe around my neck with cash, one travelers check, a room key, a credit card, my license AND my entry ticket to the parks that has to be fed through the machine at least twice each day. I keep the ticket near the cash, not the room key or credit card and it still demagnitizes. I was also told to keep the ticket away from my camera! Maybe I should glue it to my forehead.