The campground was re done just a few years ago and has sewer now. It is the Keys, so lots of activities are orientated towards the water. There certainly are better beaches in Florida. There are plenty of land based attractions to visit also.
Drive down and spend one day in Key West. Ride the train around and soak in the unique things seen there. The drivers are great tour guides.
It will be warm. There are some outstanding restaurants there.
The keys are a "quirky" place that everyone ought to try at least once. A vast majority of those that do, love it and return time after time.
Hope this helps.