In the DT, there is also a tune called "Hop up, Ladies" with the line: "Did you ever go to Meeting, Uncle Joe?" and the note that the tune is "McLeod's Reel", and the source given is Our Singing Country by Lomax.

Sounds like a bit of the Folk Process going on, if you ask me! [Trans: a game of "telephone" played over the course of several generations...].

There are lyrics in the DT... Do you have lyrics for "Did you ever go a courtin'?" It occurst to me that variation in tune might be there to cover the rhythm of the words.