I saw Neil in 71, but I think it may have been 72 at The Filmore... West, but it wasn't called West at that time cuz it was the only one.
He had Graham Nash as a surprise guest and walked off stage 'cuz of the cops standing around the stage to protect him and said "he couldn't play like that cuz he felt he was in jail".
I want to know if there are any videos of that show.