Really nice guy runs this area. He was very accommodating and communicative.
I was never able to find a flat space of road, mostly bumpy and narrow, not like the pictures. So it worked out that I did not end up bringing a vintage car there because it would have been a challenge on those roads. To give the benefit of the doubt, maybe there was another spot around there with flatter road I never saw but I arrived late due to my car trouble and never found a flat spot.
I just thought I'd mention it for others who intend to use cars around here. It proved to be a challenge even with a more modern car with all wheel drive.