Off state road SR207 at I-95 there is a flea market with a Campground and if you ge east toward St aug. there is another on the left just before the right hand turn off; can't remember name. if you go right and straight through signals to A1A South there is a sign for Anastasia SP. Google it. If you want to go down to Palm Coast there is Favre-Dykes SP, better Priced.
We just stayed in St.Johns Flea Market and campground as was mentioned above. They have seversl pull thurs and back-ins some grass and some paved. Full E/W/S connections. 5 mins off I-95 and about 15 from St. Augustines. We were just going to be there 2 nights and it was easy to get to. Better than a lot I have stayed in and honor good sam discount. Wife wanted to hit the outlets and go to St. Augustines.