Wow, thanks for linking that article... Second, I was at all of those concerts mentioned, Billy, Meatloaf and Boston. When Boston played the paint was falling from the ceiling like it was snowing. Also students would sit outside during the concerts since the Barn windows would be open and they could hear the whole thing.
Here are some other musical performances and speakers at The Barn in the latter half of the 1970s. BTW, the Gene Roddenberry appearance, of Star Trek fame, was one of the earliest incarnations of a Star Trek convention:
Jefferson Starship, Jerry Garcia Band, Warren Zevon, Boston Symphony, Bruce Springsteen & The E Street Band, Harry Chapin, Gene Roddenberry, Alan Alda, Hall & Oates, Smokey Robinson, Gabe Kaplan, Dan Fogelberg, Kinks, Jackson Browne, Phoebe Snow, Billy Joel, Arlo Guthrie, Brewer & Shipley, Renaissance, Caravan, Southern, Hillman & Furay... more.