Camping around Cleveland is like finding a needle in a haystack. We visit our daughter in Mayfield Hgts twice a year and stay at Punderson State Park. It is about an hour drive to the R&R , but has 7 full hookup sites, and many with just water and electric, but with dump station nearby.
If I was visiting the R&R, I might think about boondocking at the walmart, since I would only be there a day.
Good Luck