Nude places or activities
There are several clubs with in easy driving distance of central Ohio. I been to Cedar Trails in SW Ohio and Sun Showers just across the Indiana border. Both are nice. I also heard nice things about Green Valley and maybe someone on here can give you a more personal opinion. Unfortunately there are not any true public beaches or parks that allow nudity and Ohio law can be a bit tricky on what and where you can get away with. There is also some good non landed clubs that have house parties if you wanted to try something on a smaller scale. A quick search on AARP can give you more information about clubs and groups close to you. Find a friend and go exploring!