Yes he did. I've been watching old Hee-Haw episodes at lunchtime for the last couple weeks on a local digital channel. They just run in a loop... the other day I saw one with Hank Williams Jr. from 1969. Didn't even recognize him without his trademark beard and sunglasses... which of course had not yet happened in 1969.
But yessir, Roy Clark was a musician of a very high order, who also understood how to be an entertainer.