Campgrounds and RV parks near St. Marys, GA

St. Marys sits on Georgia's southernmost coast, at the tidal mouth of the St. Marys River and just across the sound from Cumberland Island, Georgia's largest and southernmost barrier island. The seashore covers about 36,415 acres of maritime forests, salt marsh, and beaches, with nearly 18 miles of undeveloped shoreline. RV travelers use the town as a base for the national seashore, the Intracoastal Waterway, and Interstate 95 road trips between Savannah and northeast Florida. Campground options range from full-service commercial parks to a state park on the tidal river. Jacksonville N/St. Marys KOA Holiday and Country Oaks Campground and RV Park sit near the I-95 corridor for easy in-and-out access, while A Big Wheel RV Park and Huck's RV Park offer smaller setups closer to town. Crooked River State Park provides the most natural setting of the group, with wooded sites, cottages, and river access. Because Cumberland Island itself is a passenger-ferry destination, RVs stay on the mainland. Most travelers park the rig at a St. Marys-area campground and day-trip to the island by boat.

Crooked River State Park is reserved through the Georgia State Parks system on ReserveAmerica. Reservations are available year-round on a rolling 13-month window, which matters for weekends, holidays, and any date near a school break. A ParkPass is required for all vehicles and is not included with the reservation; overnight guests pay the daily ParkPass fee only once per vehicle for the duration of the stay. Jacksonville N/St. Marys KOA Holiday, Country Oaks Campground and RV Park, A Big Wheel RV Park, and Huck's RV Park are private parks booked directly through each operator's website or by phone. Camping on Cumberland Island itself is a separate process handled by the National Park Service: a permit is required, and visitors reach the island via the Lang concession ferry from St. Marys, which does not transport vehicles. Book the island campsite before locking in the ferry.