I was there at the second show, and from my memory, it seemed much longer than a 45 minute wait. The crowd was really getting restless, and Bill Graham came out and was pissed at the crowds reaction. People were starting to throw things, and boo. The concert was also short. They were good, but not what I expected as far as long guitar solos ect. The concert was less than 2 hours if i remember right. There may have only been one small encore, or none. Again, my memory is not what it used to be!
I also went to all the day on the greens and concerts in the Bay Area. For some reason, we hated Bill Graham! I can't remember for the life of me why, other than maybe we thought he was driving ticket prices up or something. But we did not have a good impression of the man.
As for his employees, most were fine, and yes, drugs and alcohol were allowed, but some of the guys were a little rough. Once concert at Cow Palace, I was in the front with my friends. We were 16 and from the heat and smoke I started to pass out. One of the employees that stood between the barrier and the stage, started to lift me over the barrier. I came to, and said, I'm fine, let me go back over. He drug me to the end of the barrier and pushed me out into the crowd!
Cow Palace as always a rough crowd, and not a good place to be a young female alone. So there I was alone in this huge crowd, and no cell phones back then. I was scared and pissed off! So some employees were not nice. ;-) By the way, I did manage to work my way back up to the front and find my friends, and let him know what an ass he was.