Papaso - I found this campground on the Florida state park Web site, and I RV camped there in 2004.
Campground Review
As much as I would like to give a bad review just so we could camp here more often (it's very difficult to get a site), and being the good guy that I am, I have to be honest and as far as Keys camping goes there is no better place in my mind. We're very lucky to be only 1.5 hours north, and we visit as often as possible. The sites are beautiful and right on the ocean with electric/water and clean bathrooms (new ones being built as I write this). It's about 15 miles north of Marathon. Fishing is great with world class flats fishing. The sunrises and sunsets are awe-inspiring. If you're looking for peace and relaxation, this is surely a place to visit. I love this place.