Can't speak directly to those specific areas but rustic (vault toilet, hand pump water) campgrounds are generally much less densely populated. Not sure a generator
would be terribly welcome but I would guess a solar panel
would start some interesting conversations.
Many National Forest lands have access roads if you don't mind getting very rustic. Same with State Forest lands. No amenities, not even water or even sites just rough access roads and find a place to camp. Fire regulations, waste (human) and trash disposal rules need to be known.
You might want to get a site near an interesting area of State or National Forest, then drop the camper and check out the access roads in the TV just to find out the road conditions. Much better to have to back up just the vehicle for a mile if the road turns out to be impassable.
Google Earth satellite view can be a good source of maps and the respective services may also provide them.