Don't worry if you have to get a room out of town. Even when we have a room in town, we rarely have time to go back to the room during the day. We stay on the go the whole time.
The suggestion to wear Crocs and socks is a great one. I wear them every year. Crocs are also a great choice for every one in the family, if you go to Disney World. I digress.... :)
Wear something cool. One year I took some cute little pant outfits that weren't all cotton and I nearly burned up. The next year, I took cute cotton tshirts. You need a light jacket for night. It will cool down.
Refill your water bottle at the water fountain. Save your money for fat quarters!