I used to spend a lot of time there as a kid. There's a little red wooded platform (or used to be) overlooking the pond by the road on the property that I learned to fish from. Lots of time spent catching sunnies there!
The whole place was started by a small group on people from Chelsea, including my grandmother in the early part of the 20th century, basically as a retreat for city kids to get fresh air, swim, hike, learn a bit about agriculture, etc.... Because of my grandmother's founding connection, my family had a summer house there for many many years, one of the few houses on the property and I wonder if it's still there or if they tore it down. If I remember correctly from my grandmaw (who died at 99), it was a 100 year lease, and after that is when the hunting/shooting club bought it. It's kind of ironic that my grandmother helped found the place as a retreat and especially as a place for underprivileged children, and now it's owned by literally the most wealthy in American society. That would make her really sad if she knew.