One of my fav concerts of all time.

Worked at many concerts back in this era. This one started during the day and ran into the night. I delivered the spotlights to it. Then sat on the edge of the stage, drank beer, and enjoyed the show. Still have a T-shirt somewhere. Besides the already mentioned performers, It seems like Clarence "Gatemouth" Brown performed at this one also.
BTW....Even though Ann Wilson of Heart hasn't aged nearly as well as Nancy Wilson has, they were both steaming hot back then. LOL