I'm pretty sure they have a water source but your electric you may have to use your own portable electric generator.
Yes very different verity of Price's
Lots of places to stay and lots of different pricing. It will also depend on when you plan to stay. I recommend old mans cave compground, it's a logit compground with electrical hookup and it's right next to one of the best trials hocking has to offer, old mans cave. Enjoy your stay
Check with the campground
Check with individual campground
Depending on what Campground you stay out prices will be different. You can check on Ohio State Parks
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