There are very few campgrounds near Cuyahoga Valley NP. Caskey's campground in Orrville is about 30 minutes away.  Most of the campsites are occupied by long-term residents - only a few sites are used by people like us staying just a few nights.  We were there for 3 nights.  People were friendly enough.  Sites have water and electric, and there's a dump station.  The bathroom facilities are a little rough but functional.  The road in is really bumpy so take it slow.