Donkey: Hee-haw, hee-haw, etc.
Singing: Hee-hee, hee-haw-haw, hee-hee, hee-haw-haw (etc, while the announcer announces:)
Announcer: Welcome to Heeeeee-Hawwwww! With special guests (insert Country music greats here)
And starring Buck Owens and Roy Clark.
Roy Clark: And the whole Hee-Haw Gang!
Announcer: Junior Samples, Minnie Pearl, George "Goober" Lindsey, etc...
Buck Owens: Time for singing and time for jokes,
Roy Clark: Gather 'round and join us folks.
All: Right Now!
Lyrics taken from http://www.lyricsmode.com/lyrics/r/roy_clark/hee_haw_theme.html