When I suggested it to them during our last visit to what is now a full blown National Park with a visitor's center, I got the excuse that the unmarked road nearest the park to Shanksville would remain unmarked because the locals didn't want the traffic disturbing their little community.
What a crock, I thought. Build a toll road out of the south end of the park to connect to the road to the memorial chapel and Shanksville. Share the proceeds with the town and they would be happy to have the extra revenue. But I think like an economist and not a government bureaucrat.
Sounds like the government bureaucrat is acting favorably by allowing these country folks as much peace and quiet as they can considering the circumstances. You're sounding as though you're probably more of an opportunist looking to see if there's a profit to be made somewhere. But there are still people out there who do not have much wealth yet have everything they truly need and wish not to be bothered. The excuse is probably not a crock.
I think those are excellent ideas. Maybe you need to go over the head of the NPS?