As close as Barney and Andy were, was there ever an episode ( apart from the one in color when Barney comes back to Mayberry for a visit ) where Barney stayed overnight at the Taylors ?
I don't think Thelma Lou or Goober ever did, but Otis ( as a prisoner ) and Gomer both stayed over.
Helen certainly never did, that would have been most inappropriate !
Then there was Andy's cousin and a couple of Aunt Bee's "beaus."
Any more I missed other than some of Opies buddies ?