I spent a weekend last spring in Portsmouth Ohio and the Shawnee State Forest. I was told there was a private hunting reserve just east of the Shawnee that hog may have escaped from...didn't see anything.
Up 23 there is a holler a couple miles up that supposedly had hog, but all private land so didn't see any sign.
Stopped in at Lock Stock and Barrel. Nice folks.
Southern Ohio Hunting Preserve (
http://www.sohp.net) has a hunting preserve. I get their emails and have chatted over email with them. Very nice folks and looking forward to visiting them.
Hope that helps,
Eric