Gum - especially if you're flying (if your ears don't pop easily), Also you can't buy Gum at WDW. (also suckers work well for your ears if you or kids have a problem) (it's probably already on your list, but I had to mention it, 'cause it's such a HUGE thing for me...my ears don't equalize on most flights
)
Allergy Meds - Alot of people have trouble the first few days their in Florida (or anywhere new for that matter) and a handy OTC Claratin or something can save you a lot of suffering. (and nobody really wants red puffy eyes and noses in their vacation photos
)
Off! Wipes - Easier than a spray, and won't leak in your luggage or day pack.
Shout Wipes - I always seem to wear at least some of my meal, these are easy to carry about (no leaking) and have saved several of my favorite shirts.
Safety Pins - Easier & smaller than a mending kit and can save the day on the fly.
Zip loc bags -all sizes. I always find a million uses for these, from keeping everything dry (and sand free) in the rain/water rides/water parks, to organizing small things in my bag (Although i am a bit of a compulsive organizer... lol) Plus it tends to make bag checks go easier, especially if security chooses to look indepth at your bag, just pull out a few clear plastic bags and voila - all done.
Small travel/sample size of deodorant carried in your day pack. This isn't a must for everybody, but florida is very hot and VERY humid...I've seen several people (in the restrooms) reappying throughout the day.
