For those who might need some direction to Virginia BBQ, head east on Liberia Avenue, away from route 28 and towards the Prince William County Parkway. Just before you come to the intersection of the parkway, there will be a strip mall on your right; Davis Ford Shopping Center. Virginia BBQ is in that strip mall.
If you're coming from the eastern end of PWC on the parkway, go through the intersection at Liberia Avenue, then take your next right at a light (about 50+ yards) into the strip mall parking lot. At this point, you're very close to Virginia BBQ (less than 100 yards).
Check Google Maps for more detailed info but please note that Google Maps places this little restaurant in a different shopping center, which is across Wellington Road from the Davis Ford Shopping Center where Virginia BBQ is. So Google Maps is in error with this one.