I missed that concert. 1969 was the year that I did in fact visit the Vatican and had an audience with Pope Paul. I was 14, got terribly drunk, played in a little rock and roll combo and my RCC faith had been shipwrecked.
The following year the Lord turned my stoney heart into a heart of flesh and everything was brand new.
I never did go to a King Crimson concert but I did own a cassette of theirs.