If you have animals or small children don't get a site on or near the water. There are alligators. One night one showed up just as we were finishing dinner at our picnic table.
It is best if you know the dates ahead. In Florida it is hard to get sites. keep trying. Contact Florida state parks and use their website. 11 months out if you want to be sure. Check every morning and throughout the day for cancelations. This is the best I can offer