Sterling Sunoco apparently has some pails, there are also some spots in Warrenton.
716 West Church Road
Sterling, VA 20164
703-444-7263
Five Points Food Mart near Roanoke Rapids apparently sells it in pails if you want to get it down there or NoVA is out. It's maybe about 20 minutes from the track to the southwest.
5501 Highway 903
Roanoke Rapids, NC 27870
252-535-3003
Here is the map, which can also search for specific fuels. You might be able to find something closer between you and the track that's on the way.
www.sunocoracefuels.com
www.sunocoracefuels.com