I found this location while trying to get Lost? This is boundary of the park and the land beyond here is private. However its a nice woods road, and it clearly sees some traffic. Plus the location looked like it could use a cache, so there's that. You're looking for a modern ammo can.
You could also follow the woods road to the right which traces the boundary of some public land held by Colchester as a starting point for getting Lost? yourself, but that's up to you.
To get to the herd path go left out of the parking lot. At the big white pine on the height of land near the sign for the point is a small herd path that becomes a proper woods road a little further in and leads to the park boundary.