Jesse Colin Young lived around here for over 20 years, moving to Hawaii after losing his house & studio in the Mount Vision Fire of 1995. I saw him do several solo sets in the 80s & 90s. This particular time, he opened for the Rowan Brothers at the Sausalito Art Festival on 9/4/93. He/they were just standing in a wide spot along the main path through the art exhibit, playing through their monitors. Footnote: David Grisman Quintet played on the main stage that day. All local groups, playing glorious acoustic music.
Through the miracle of Youtube, here's Jesse & Jackson Browne sharing a mic to Get Together at No Nukes in 1979 with Steve Stills, Graham Nash, and thousands of others:
https://www.youtube.com/watch?v=Odf1WWhAF6I