About 10 miles south of St Augustine is the Faver-Dykes State Park where I am workamping through the end of December. Rates are $19 per night for non-residents for water and electric.
The lots are large and most are very private with firepits, grills, and picnic tables. The 3 paved sites for disabled can be rented and reserved by the non-disabled.
It is drop dead gorgeous for nature lovers and Pellicer Creek runs through the park but not the campground. Boat ramp, canoe rentals, fishing pier, etc.
I write about the park on my blog. ;D I love it here! But bring some food, the grocery store is 12 miles away but ice is available at the campground.