I held fingerstyle workshops at Merlefest for two years in the 1990s. At one workshop I sat with Doc and we listened to for a while. During one song he said, "I play that the same only with a capo on the 2nd fret." The guitarist was playing the song with a capo on the third fret!
Doc sometimes used to call a capo, "a cheater."
Not many people could go out and play before a crowd of 1,400 people and say, "This is just like I was playing in your living room," and mean it. To him it was no big deal- he was just like everyone else except he happened to play the guitar.
Of course- better than anyone. Doc was always very complimentary- he especially like to brag about Merle's playing- they'll be picking together now in the great bye and bye.