Hi Joe:

I believe it was called The Golden State Theater on Alvarado St in downtown Monterey. It was a nice theater but not sure how often they use it for concerts. I think they have other programs there too.
The concert with Donovan was very nice and the theater had a pleasant scent of a light fragrance of some sort - not overpowering by any means during the concert. It was just for the Donovan concert.
Donovan sang the song, "The Promise" which was a beautiful song he wrote and sang that night. He introduced it by saying something to the effect that it was a song he would sing at concerts but not plans to have it released on an album. (not sure if it has since been released since then though) It was a lovely sad ballad and I know you can hear it on Youtube but not sure the reason it was not going to be released on an a album. I loved Monterey and Carmel and just the entire area up there. I know about the language school in Monterey.
So you too traveled a distance to go to a concert when you saw Joan Baez. I always have memories of Joan and her sister Mimi living in the Carmel Valley. I used to know a man many years ago (passed away a long time ago now) who had met Mimi on many occasions at a theater he ran up there (a playhouse I believe) in the Monterey area (a small playhouse)

Lin