See more archival GD video at deadvids.com
Many thanks to KIT FILMS and The Prelinger Archives.
Hat Tip to Brokedown House Productions for the post work.
The band was reportedly smuggled on campus in a bread truck.
The Eleven/ That's It For The Other One from 4/26/69 w/ in-camera edited raw footage featuring Pigpen singing and playing organ. @8:38, this clip proves that The Other One was in fact played on 5/3/68. "Please Strike - Support Liberated Classes" banner @9:45.