If the gators don't get you, the mosquitos will!!!
Not a campground, but Billy's Swamp Tours on alligator alley is a very touristy kind a place. Good for a day visit, has an indian village with a few (big) alligators they feed and they have air boat rides where they take you out in the everglades and they point out gators and catch a fish or two. You can even buy some fried alligator bites while your there. But be forewarned... You must take mosquito repellant of the highest quality and good sunscreen!!!