I had some property on the Vineyard back in the 80s. When I gave my in-laws a tour of Chappy, my late b-I-l was almost apoplectic. Once you’ve seen the original site (it’s changed now) you realize what horse manure Fat Boy’s story was.
In 1986, I rented a bicycle and rode out to the site. There were heavy piles along both sides of the bridge so that no car could ever again drive off and heavy chains across the approaches so that no car could get onto the bridge. I came to the same conclusion about Fat Boy that you did.