I have been all over to all kinds of sporting goods stores as well as many luggage stores and cannot find a waterproof bag/pouch to carry my driver's license and credit card in. Do I need to be worried about this, or do they sell them on the ship? If so, does anyone know how much they are? We are going to Atlantis while we are in Nassau, and I seriously doubt we'll even use the room that we booked at Comfort Suites. I don't know what I will do with my valuable items while we are in the water. Should I break down and order the aquapac belt bag for $35 or just wait until we get on the ship? Thanks!