It's an Astronomy group from Amherst (
Amherst Area Amateur Astronomers Association ) . I live in the area so I saw one of the fliers. They had between 5-6 of the real big scopes between 8-12 inches. They go through a tour of all the these objects. The weather was really nice when I went last saturday. Here is the fixed link sorry, it has all the info
2016 Mt. Greylock Star Parties It's at the war memorial tower.