outdoor winter camping allowed at Canaan Valley State Park, from Whitegrass website:
Can We Winter Camp?
We suggest the Canaan Valley State Park campground, where no reservations are taken or needed. Heated bathrooms, electric hookups, flat, plowed, safe in a blizzard, a dryer, phone...close to their lodge where you can buy your way into their heated pool and exercise room...ahhhh...
Primitive camping along the Loop Road, in the Sods, National Forest, the hinterlands around Whitegrass...we can advise.
Can We Winter Camp?
http://www.whitegrass.com/pages/FAQ.html