Another Ohioan here (in fact, I was working in Bucyrus two weeks ago - nice town!)

Have you headed down south of Columbus, to places like Zaleski and Tar Hollow? I get down there when I can - maybe we can meet up there some time.

For your girls, Old Man's Cave (near Logan, down route 33) might be a great near-backpacking trip. The scenery is gorgeous, only a little bit rugged (but with some sheer cliffs) - definitely worth checking out.