K.J.
You have some great suggestions, but I would definitely second the suggestion about slip on shoes. Wear sandals or something else easy to get on and off, because they will make you take your shoes off no matter what kind of shoes they are. Also, you can take empty water bottles, and then find a drinking fountain on the other side of security to fill them up at. They will also come in handy if you are visiting Disney or other parks where the drinks are extremely high prices. Also, check the booster seats... the kids can't sit in them on the plane. Also, in FL, all your kids are old enough to not use a booster seat, so if it's an extra charge to check the boosters you might consider leaving them in your car. We just moved to KC from Tampa, FL, and the child seat laws there are 4 and up can be in a seatbelt, so you would be fine without the seats. Hope that helps!