Ohio is a treasure trove of fantastic state parks and an excellent place to camp in an RV. Tar Hollow State Park, just outside of Laurelville, may only be about 600 acres, but it's full of deep ravines and dense forest. The park’s name comes from its early history when settlers would use the pitch pines along the ridges for pine tar. Now, the trees are left untouched and standing majestically for visitors to admire.