Check out rendezousohio.com you will have to ask to join the forum and they will put you in touch with other reenactors in Ohio and sourrounding states. They have put me in touch with others via facebook. However this is still my favorite and the best site on the web. :thumbsup:
Jackson, Ohio, is not to far from portsmouth. The Sons of Liberty club holds an event Memorial weekend and again in October. It is a small camp but a very nice place (Canters Cave). Grassy Run is held early Spring but it is closer to Cincinati, somewhere close to Winchester,Ohio I think. I have walked through it but never camped it.