Quite frankly, I think you would do better positioning these as 'glamping' locations for tent campers than RV sites. Assuming you live in the 'daks I am sure you know that all the DEC areas are completely full and that even dispersed and backcounty camping is really hard to come by. Folks coming up for a long weekend would pay a premium to know they have a reserved, private, 'wilderness' campsite.
Market these as 'wilderness lite', maybe install a small platform with some sort of rain cover, or a lean to, a fire pit (hole in the ground with some rocks) with a few Adirondack chairs and a latrine. Take some over saturated photos at dusk (photoshop out the black flies) with bearded 30 somethings sitting in the Adirondack chairs around the fire with Woolrich and Rumpl blankets, drinking Saranac or a Moscow Mule. All up, it would be a few thousand dollars to improve each site, then I would think you could get $200 per weekend night with the hipster down state crowd. Most folks would probably only stay 2-3 nights, but you could make your investment back in one season. It would all be about the marketing.
