Sometimes, I wear shorts with the cell phone pocket for my phone (which I carry everywhere in WDW)...when my parents and I go, and we're doing different things, we all bring our phones, and then I just use cargo pockets for the other stuff. If i buy something, than I'll just use the bag from the store to carry my stuff. When I went to AK in January, I rented a locker and kept going back to it to stash whatever I had. We went to MK that night, and the money you use for a locker rental in the morning is good all day <i>everywhere</i>...so I just got one at Main Street, same deal. I'm not big on carrying stuff anyway...my advice for y'all is to bring small stuff, like pocket digital cameras. Cash can be kind of bulky too, sometimes, and to lighten up weight you can just carry your room card and use it instead of money...
JC