State Park / State Forest · Maryland campground guide
The numbers
Fee range
$30–$50/night
Season open
April through October
RV size limit
Up to 40 ft
Reservation window
12 months ahead via MD Parks portal
The insider read
Appalachian Trail crosses through. Lake Greenbrier swimming + paddling. Closest state-park camp to Antietam battlefield (25 min).
Original analysis from PickRV — synthesised from public sources you can verify, pulling the operational details competitor guides typically skip.
Verify at dnr.maryland.govOn site
Book it right
PickRV doesn't handle campground bookings — reserve direct through the official channel so policies and cancellations flow through one record.
Opens parkreservations.maryland.gov
Every fact above is sourced from the managing agency's canonical page. Cross-check fee, season, and size limit before you depend on them.
Match the campground's size limit and hookup level to a vehicle category, then plan the rest of the trip.
Keep exploring
Near Crisfield
StateInsider tip · Chesapeake Bay marsh paradise — 25 miles of paddle trails. Soft-shell crab capital town across the channel. Watch for blue herons + osprey from your campsite.
Near Grantsville
StateInsider tip · Largest state forest in MD (54,000 acres). Big Run is the primitive camp; trout-stocked Savage River runs along. Quiet alternative to busier western MD state parks.
Near Mt Storm WV
COEInsider tip · MD/WV border reservoir — bass + trout in same water. Whitewater release schedule for downstream paddling published by USACE.
Near College Park
PrivateInsider tip · Closest full-hookup camp to Washington DC — Metro Green Line shuttle to DC daily. Sites near the front gate quietest; back loops next to Beltway pick up traffic noise.
Your next step
Greenbrier State Park Campground takes rigs up to 40 ft, so what you arrive in decides whether the loop works at all. If you don't own one, the same trip runs on a motorhome rented in Maryland.
Nothing in Maryland is bookable today. Dated requests are what we take to owners, so give us the window you actually want — you get one email the day a rig covers it, and nothing else.
Nearby & related
Sourced costs, campground directories, and the places worth a detour — the next layer of Maryland trip planning.
Before you go
Maryland rules
Verified 2026-05-10
