Ziplocks, quarters for the ice machine, (We took a big cooler that stayed outside but we would slide it in the air conditioned pop up during the day while we were at the parks to help conserve ice). We bring a lap top, a tv tuner and a coax cable so we can watch the disney cartoon channel in the camper sometimes.
Camp site decorations (at least a string of christmas lights or two). Rope (there is no clothesline) and a small grill (there is no fire ring). You might already know this but just in case.
More towels than you think you need. They will take a long time to dry. Tie down straps for your awning. Summer t-storms are serious down there.
Have fun!