Building a van for Ohio
A van works well in this state. Distances are short, towns are close, the byways are paved and the campgrounds that a van can reach are mostly developed: three at Lake Vesuvius, three on Corps of Engineers lakes, and the state forest and state park campgrounds beyond them. An Ohio state park site takes two vehicles, or one vehicle and one boat, which suits a van plus a trailer if you plan it.
Ask a builder about wet cold rather than deep cold. Ohio winters are chilly rather than bitter, but they are long and damp, and the state forest bridle trails and three of the four APV areas shut from December to April, so a van used through winter is mostly a road and campground vehicle. Ground clearance matters more than four-wheel drive on a soft spring forest road.