Howdy. I'm Dave C. The closest actual racing to you that I know of is Spring Valley in easter Ohio. Millport, OH, 30 miles or so south of Salem. They don't charge a arm and a leg, either. They have 2 more this year. Sept 26 and Oct 10.
Their web site
http://www.noora.freewebtools.com/index.html
There should be plenty of riders over your way to race through the countryside on trail rides!
Enjoy that Pilot. They are a special vehicle!
As far as cost, to be competitve at Spr Val, you need at least porting and a pipe. Don't let just anybody port it. Local guys can do good porting, but then, they can also screw it up. The air box mod doesn't cost much. Depending on if you do the assemby or have it done, $400-1000. A new drive clutch and big carb can be added over time.