Yes. We were.
Well, I was going to ping you, but you beat me here. The first song I ever heard him play live was Tennessee Stud.
And you know me - I have to get in the guitar story. Around 1968, Doc started playing a guitar ("Ol' Hoss") made by D.W. Gallagher and his son, Don Gallagher.
Here's what I have on my iTunes right now - an old Doc Watson, Clint Howard, and Fred Price 24-track album called Old Timey Concert.
Not so much flat-picking as Americana, hills, and bluegrass. Found one song on YouTube from the album very quickly.