I also am not aware of any VA RV parks but you many have been thinking about the American Legion such as
this one. Many American Legion posts have RV parking availble for members to use. Some of them are quite extensive and nice.
Another resource, allready mentioned earlier, if you are retired military is the
U.S.Military Campground website. It is a privately funded website owned by a retired U.S.Air Force member and is probably the most complete military campground resource available.
Barney