...yep, the spiggot is open. Good tales, Guy.
I'd followed Gibson since 59---my senior year in high school. His solo shows in that long low basement room you mentioned were great. I think he only did one song with 12-string----"Matty Groves".   Gibber taught that arrangement of the song to Joan Baez---during the gig at the Gate where she opened for Bob. (What a voice she had.)
My brother was in the audience at the Gate Of Horn the night the Gibson and Camp LP was recorded with that silly song making fun of Marty Faye's sister's sexual preferences. They had to pull the album from the market and when it came out again it was without that song.----- The recently issued CD of that album once again contains that song. I think it is on Alan Shaw's Folk Era Records label. It is also in the current Collector's Choice mailorder/web catalogue.

Art