Hi, Rich -
We have one person's recollection of the song posted above, but still haven't found a copy of the song in print. Collectively, we have a vast collection of school songbooks that we've indexed here, but the title doesn't show up in our songbook index.
Any chance you know the song by a different title? I think we've checked all the school songbook songs with "wagon train" in the title.

-Joe-