Saw them in early 71 on Pensacola Beach in a small beach bar. I remember sitting on the floor about 10 feet from the stage. One of the best shows I ever saw.
Saw them again about 6 or so years ago at the N O JazzFest with Derek Trucks and Warren Haynes on the geets, Chuck Levell on Piano and Susan Tedeschi doing some backup vocals. I was shocked at how good they were after all these years. Talent begets talent.