Campbell was a charter member of the cast of Hee Haw on CBS-TV from its beginning in 1969, though he also served as a head writer. His regular characterizations included:
- “Archie’s Barber Shop”, in which he performed his Spoonerism stories and his “That’s Bad/That’s Good” routine
- “Doc Campbell”, with Gunilla Hutton as “Nurse Goodbody”; though Campbell portrayed a M.D., a certification hanging on the wall clearly showed him being a veterinarian (D.V.M.).
- “Justus O’Peace”, his version of the classic “Judge” routine of Pigmeat Markham.
One of his most well-known segments was the song “PFFT! You Was Gone”, in which he would perform a short verse of original comedy, followed by the standard chorus of “Where Oh Where Are You Tonight”, which would conclude with him and a singing partner, often Gordie Tapp, blowing a raspberry at one another or at the camera. In later years, Tapp would be replaced by the episode’s guest star, who was mentioned in Campbell’s lyrics right before they revealed themselves.
Campbell also recorded several comedy-music albums, which he continued doing during his Hee Haw years; such as Bull Session at Bull’s Creek with Junior Samples, released the year before Hee Haw premiered. He frequently performed musical duets with singer Lorene Mann.