Like shows at the Greek Theatre or Red Rocks, the Alpine Valley shows had a religious dimension to them for those of us in the Midwest.
I last saw them in 77 or 78 in Baton Rouge. I go to that Berkley Archive site and have dowloaded all the live shows I attended from early to late 70s. I was at this Fox show. I am a biggest fan of early Pig Pen Dead.....Alligator