I ran into a fifth grade schoolmate and we pieced the song together so i thought I'd share it.
ROLL ALONG WAGON TRAIN
Oh across the plains roll the wagon trains
On the way to the gold fields far.
Where the bobcat prowls and the coyote howl
And the herds of buffalo are.
Roll along, roll along, roll along wagon train
G A7 D
Roll along, roll along, roll along across the plain.
We will camp tonight at a pleasent site
and we'll sing to the banjo's strum.
To the fiddles squeal we will dance a reel
And be gay what ever may come