Disnee Dad Says................................Can't help you tech wise, but here is just a little advice for at the parks. I wouldn't bring it everyday, and I would do a lot of filming outside the parks, where the admissions meter isn't running!! Hotel stuff, DD stuff. If there is a parade you want to tape, go ahead and film some park stuff on the day you tape the parade. I know they aren't that big,but if I bring mine 3 times and you bring yours seven you have a 233% greater chance of it getting damaged or stolen. Ours is pretty small but old, and you would be surprized how heavy just a couple extra pounds can be.
My only other advice, is to start planning for a second trip, even if it is a few years off!!