What a kick listening to this show.
I was lucky enough to be in the FE audience that night, with my camera, too. I was fifteen and had seen them for the first time the year before at Murray the K's Easter Show at the RKO 57th Street. Great memories.
A few months later, in August, they opened for the Doors at the Singer Bowl. I brought the April 6 Fillmore East pictures with me and got backstage with my girlfriend by showing them to Roger. He told me that he loved the shots and asked all sorts of technical questions. I was in heaven. Such a friendly guy.
He even invited us both to their Central Park concert the following week. That was another amazing performance.
The following year, Bill Graham used one of my backstage Keith Moon photos in a FE concert program.