How funny you should post this!
Just gat back from the world and I told everyone (2 ds and their families and dh and me!) to just call me Peppe`, their little pack mule!!! LOL!
I carried a beautiful Mickey neophrene-like backpack w/ water, camera, ponchos (several for us to "share"), walkie-talkies, ziploc of meds, moleskin and bandaids, film, my prescription glasses/sunglasses, candies and suprises for the kids, hankie, wipes, kleenex, and whatever else the kids didn't want to carry!!!!
My sisters each wore a belly pack (really cool, rectangular w/ several compartments. Held lots but really very compact.)
DH helped out and carried the bag from time to time, but it didn't bother me to have it on. Only got hot a few times and it was nice to have something we could stash stuff in for the water rides. Sometimes dh carried the water and camera and we usually had the walki-talkies clipped onto our shorts, which helped alot. I could stuff the autograph books and hats in their and keep them safe durring the rain (it STORMED every day but one). Cool tip, my ds asked for a small disney palstic bag (or saved one from a purchase), stored the autograph books and hats in them, then ran the belt of their belly bags through the handle and voila!!...hands free carrying. (Of course it banged against them when we made them run

!!!) But it was nice to free up hands while eating an ice cream.