First and foremost, can you bring a collapsible cooler into the parks? Specifically, MK? If so, what kind do you normally bring? We have several small ones that have shoulder straps. We could bring one of those and hopefully there would be somewhere on the double stroller we plan to rent to either stuff or hang the cooler...anyone know? Or, Sam's has collapsible coolers on wheels now for $25....really coool. Anyone done this? Is it allowed? We would bring bottled water for ourselves, and juicboxes for the kids, and maybe even some lunchables to avoid park prices if possible. Just curious. Thank you!