I wear a small backpack in the parks. It is big enough for our big camera, sun glasses case, epi pen, wallet and a few other things. Has a small zipper pocket that is against my back - that holds the tickets, FPs and room keys. It is small enough to easily fit on the rides (never had an issue), but big enough for the stuff we need in the parks. I've never had an issue with keeping everything straight, even on our last DLR trip when I was in charge of tickets and FPs for 10 people.