Sorry it took me awhile to reply but this is correct.
A couple of "did you know":
1) In the first show, Barney made a comment to Andy about how happy he was to be given a chance to be a deputy. Andy replied, "That's the least that I can do for my cousin". But them being related was never mentioned again.
2) Ernest T Bass could never remember his lines, so he addlibed most of them.
3) Andy was supposed to be the "dumb" one with Barney being the "smart" one. But after the show started and it was seen how Don Knotts and Andy worked together, they flipped it.