A brief comment to the notes on Chambers Brothers 5.29.68: the poster features Buffalo Springfield headlining, but in fact the group had broken up. The Springfield's last gig was 5.5.68 Long Beach (well, unless they reform and play another one). Graham apparently tried to get them to reform for the Fillmore, as they had "broken up" before, but this time it was for real.
I'm assuming the Chambers Brothers took over as headliners and another band was added. Note that at the end of "Time" one of the Chambers says "I'm not even sure who's coming on next" or words to that effect. I'm assuming from the stage announcements that this was the early set and a lesser known band was beginning the second round of sets.
Corry