I believe you may have confused two different lines of Park/Parke/Parks.There is a line descended from Roger Parke who settled in New Jersey, said line moving to the future West Virginia and owning/selling land there in Frederick (later Hampshire) County.This is not the same line as the one in the Carolinas; I found four George Parks in the Carolinas born in 1750 listed in the 1790 census.
In Parks Hollow Cemetery in Hampshire Co, WV, there is a Col. George Park born abt 1762, brother to John Park(e) (III) and married to John's wife's sister Hannah Millslagle.
I see in the 1767 Prince Edward County Tax Lists this entry: Parks, James Joseph Parks, George, Ned, Danil500 (Acres, presumably). This seems to be a different line of Parks, and spelling the family name then as Parks (whereas those of Fred/Hampshire Co. spelled it Parke unless a transcription error).
I believe the Parks of Frederick County were all of the Roger Parke line, having come there from New Jersey after losing out in a land grab by a Crown toady.All records I have show the Georges of that line remaining in the family properties in Frederick Co. from the time of the French-Indian Wars until their deaths.