The Marche du St-Laurent was (as far as I recall) the very first tune that I learned on the petit accordeon! I was practicing it, over and over again, in a rehearsal room at Columbia, when a student opened the door and asked: "Is that a hurdy gurdy?"
The parts were presented the other way around on Denis Pepin's video, but I began playing them this way, without consciously deciding to do so, under the spell of Monsieur Bruneau...
Here it is on a Melodie in D:
And a link to the sound file.