Tucked away in Southeast Ohio is the AEP Recreation lands, newly-named the Jesse Owens State Park.
At the current time it is free to Camp, here is how you get a free permit https://www.aep.com/environment/conservation/recland/permit.aspx
You can camp here up to 21 days free of charge. Permit that I obtained from a bait shop says that it is a lifetime free permit. Every 21 days you simply have to move to another one of their several campgrounds, therefore you could simply Boondock here for quite a long time. This is a great way to enjoy the RV life.