I spent at least 20 years hunting and fishing in the Bob Marshall wilderness area and I never heard the song there,but in Idaho in the 1930 the CCC camps conjured up a song about a Gov't Mule due to the fact they were used to pack supplies several miles on their back into the various lookouts and they kinda looked upon them selves as pack mules.There is no doubt in my mind that this is the song he is looking for.There was also some very slightly off colored jokes that came from the CCC pack mule Louie Roy