Mark. If drive a couple more hours north. There's a club 30 minutes outside of Louisville called Quad Counties R/C boat club.
I do believe there are some in Tennessee. The Knoxville Gang for sure.
Also there is plenty of District racing that goes on. The season is almost over but if you make a trip up to Evansville on September 22-23 you can check it out. Get some info. There's a couple Owensboro racers also.
6 Hours is a long drive for a race. Our longest is 4. I assumed maybe you lived in Bowling Green. If you do find anything in Bowling green let me know.