After returning from the parks with the many ideas I had, here are what I discovered are MUSTS!
I agree on Ziplocs/wipes
Small container hand sanitizer
Band Aids (a few)
FILM, FILM, FILM (expensive to buy after you are in the parks)
Sunscreen (small bottle or put in a small container)
Camera
Sharpie Marker for autographs
Snacks
Take your own bottled (plastic) water and keep refilling (cheaper)
Lots and lots of $$$$$$ (he he!)
I packed a mini back pack and filled it up the first day with many more items that I listed here. I found that I did NOT want to lug around that much stuff.
The shout wipes were a good idea, but I found that even when packed I didn't use them until back at the hotel. The first day I packed in PBJ sandwiches, small bags of chips, gummies and bottled water, needless to say, I didn't feel like doing that daily. Even though it was not cheap to eat in Disney, I found that I didn't go on vacation to pack sandwiches around

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Hope some of this helps.
Juli
Any ?s just post or email me.