P.S I can only take a small bag.
I carry a small over the shoulder purse when I hit the amusement parks and make sure I put the following in it: small wallet (containing money, a credit card, ID and health insurance info), sunglasses, lip balm and my camera. Have fun!!
Sunscreen! It's Florida, that means a hot sun in the summer, and you will burn so quick. I just went last November :)
No Food. =P
They check your bags now, apparently... hard to hide it. I'd surely bring water, though.
Money. The more u carry, the more u spend.
camera! love that place