The Boondockers Bible states the following... “Re "For the convenience of motorists, area is not to be used for camping, overnight parking, sports, meetings or other group activities. Commercial use prohibited.“ Technically, overnight parking is not allowed. However, because South Carolina’s rest areas are open 24 hours a day, 7 days a week, you are still allowed to arrive at night, and stay for as long as it takes to rest up. It’s entirely possible that may require staying until the following morning. SCDOT does not provide any kind of guidance in determining the difference between overnight parking and using a rest area for its intended purpose.