A couple other things from home to bring:
Lithium batteries for your digital camera (if you have one) They are outrageous at Disney.
Extra tapes for the videocamera.
Plug covers for all the outlets in your hotel room to protect the little ones. And any other child-proofing stuff you might use at home.
Bring jackets. Sounds silly because it is Florida but one night while we were there it did get cold and since we are from Alabama and thought it could never be cold enough for jackets we did not take any. It costs 50 bucks for ANY jacket/sweatshirt at Disney.
Some games/coloring books etc. for kids in case it is raining really hard or they get really fussy and need to go back to the room for some quiet time.
If you are going to fantasmic, wishes, etc. get the kids some glo-sticks at
Walmart, hide them in your bag and produce them right at that moment that the vendors are going around selling the $20 glo-sticks.