South Carolina.
Here, 3 of the federal campgrounds, one in nine, still take walk-ups of the 28 whose booking the agencies publish. The other 9 publish nothing either way.
See South Carolina on the mapFirst-come Reservable · every dot is a campground in its place
37 campgrounds
Brick House Campground (SC)ReservableOpenfrom $52 pull-through sites24 sites550 fttoilets
Buck Hall Recreation AreaReservableOpenfrom $2019 sitesrigs to 40 ft10 fthookupsdrinking watertoilets
Longleaf CampgroundReservableOpenfrom $1516 walk-in sites4 group sites16 sites120 fttoilets
Sedalia Campground (SC)ReservableOpenfrom $51 pull-through site3 group sites12 sites560 ftdrinking watertoilets
Lick Fork Lake Recreation AreaOpen370 ft213 ft to Lick Fork Lake
Coneross ParkReservablefrom $2632 pull-through sites106 sitesrigs to 60 ft690 ft614 ft to lakehookupsshowers
ModocReservablefrom $2241 pull-through sites70 sitesrigs to 48 ft340 ft95 ft to J. Strom Thurmond Reservoirhookupstoilets
Oconee PointReservablefrom $3813 pull-through sites70 sitesrigs to 50 ft680 ft271 ft to lakehookupsshowers
SpringfieldReservablefrom $3630 pull-through sites79 sitesrigs to 60 ft680 ft297 ft to Hartwell Lakehookupsshowers
Twin Lakes (SC)Reservablefrom $3623 pull-through sites100 sitesrigs to 62 ft660 ftunder 10 ft to lakehookupsshowers
Collins Creek Seasonal Campground (SC)Reservable1 group site36 sites400 ftdrinking watertoiletsshowers
Hawe CreekReservablefrom $2814 pull-through sites34 sitesrigs to 45 ft350 ft97 ft to J. Strom Thurmond Reservoirhookupstoiletsshowers
Cherry Hill CampgroundReservablefrom $155 hike-in sites17 with a tent pad29 sitesrigs to 60 ft2,250 ft313 ft to West Fork Crane Creekdrinking watertoiletsshowers
Whetstone Horse CampReservablefrom $1518 with a tent pad1 pull-through site18 sites1,680 ftdrinking watertoilets
Woods Ferry Campground (SC)Reservablefrom $72 pull-through sites1 group site17 sites370 ftdrinking watertoilets
Rocky Branch Seasonal Campground (SC)Reservable10 sitesrigs to 49 ft500 ft
Bluff Hike In CampingReservablefrom $106 hike-in sites6 sites110 fttoilets
CrescentReservableSites from $2404 group sites4 sitesrigs to 40 ft660 ft68 ft to Hartwell Lakehookupsdrinking watertoiletsshowers
Poulous Loop Group Campground (SC)Reservable1 group site1 site460 fttoilets
BroylesReservableSites from $751 group site660 ft43 ft to lakedrinking water
Clarks HillReservableSites from $1010 group sites380 ft252 ft to J. Strom Thurmond Reservoirhookupsdrinking watertoilets
ParksvilleReservableSites from $502 group sites340 ft345 ft to J. Strom Thurmond Reservoirhookupsdrinking watertoilets
Poplar SpringsReservableSites from $751 group site710 ftdrinking water
Singing PinesReservableSites from $752 group sites770 ftdrinking waterUnits in South Carolina
4 with campgrounds- Sumter National Forest 16
- Congaree National Park 3
- Francis Marion National Forest 2
- Francis Marion National Wildlife Refuge 1
Source: USGS Protected Areas Database of the United States (PAD-US) land units
Source: campground records from RIDB, NPS, USFS EDW and BLM, unified by CAMPANAC, refreshed nightly