Hi Rairie,
Steve's suggestion about fire ants is good. If you see a small "hill" of sand do not step on it!!!! As he mentioned, the fire ants will immediately start to crawl up your legs and they really hurt. If you do get bit, try some under arm deodorant. I have been told it works well. Mosquitos are a problem if you're near wetlands. You may run into the infamous "love bugs". If you do, remove them from your vehicle as soon as possible. They are so acidic they eat through the paint. They don't bite but are a pain. Fortunately they only last about a month. The insects can be bothersome in some areas but I don't find them much worse than NE in the summer. Carl has a good point about a screen room but I don't think I'd attach it to the big awning. If a heavy wind comes up you won't be able to roll up the awning. Not sure if the campground would allow a free standing screen room. It, too, could be damaged by wind but it wouldn't ruin the awning which might be more expensive.
Do not feed the alligators!! Normally alligators don't bother people but, once fed, they can become aggressive looking for the next handout. You will find them in any body of water.