There really are no other fields in the area that I know of. Most of them have went out of business or should count as a business(Scary Creek).
I have only played at Tri-County once and it was a few years ago when Jaco's Paintball was just getting a West Virginia Paintball League stated. I had a great time at Tri-County and can't wait to go back. I have not been playing for a couple years and am just now getting back into the game. I am looking forward to playing there because of the new airball field that everyone is talking about. Everyone was very friendly there and really I think that field was the best in the state at that time.