Kooper was great, especially when he played with Dylan and Mike Bloomfield. But that was a few years before then ....in '66-'66.
My favorite concert experience was at a small club in "the valley" in L.A. -- The Palomino...in Feb. of 1987. Taj Mahal was playing, but some unexpected guests showed up. I was just sitting at the bar having a few drinks with a buddy (sitting to my left), and I noticed that none other than Bob Dylan was sitting right next to him (to his left). Freaked him out to no end, huge Dylan fan that he was. But he got me back when he pointed out who Dylan was talking to --- George Harrison. So we warily initiated the conversation and ended up rapping with them for about 5 minutes ....both were very pleasant and funny. Then a two young hot blondes approached them and they forgot about us pretty quickly ...lol.
Anyway, John Fogerty also showed up and and the three giants jammed classic rock tunes with Taj and his amazing band (featuring Jesse Ed Davis on guitar) till about 2:00 AM. It was an all-time night.