Where is the best place to send a group looking for a tour?

There really is no good place to send them. The tours do tend to follow a certain route through campus but in inclement weather that varies a bit. Also depending on what time it is the tour can be in a totally different place. The tours leave from the Robsham Visitors Center and the number there is 413-545-0306. They (or you) can call the Visitors Center and they may know the tour guide and about where they are located on campus.