Yeah, Ghost is right (as always) and Tommy, too. Courier du Bois is the word you're looking for, "runner of the woods". Those were the sort of Free Trappers (some considered outlaws in many ways)in the early days of the French trade.
Voyaguers weren't trappers, they were canoemen well into the 19th century. They were the "engages" on the Lewis and Clark expedition. There were guns in the boat, but mainly for hunting as, yes, the non-aggressive manner of trade.
A great bunch of books on the subject around the lakes here is Peter Newman's books on the HBC and NWC, Company of Adventurers and "Ceasars of the Wilderness", both available on Amazon. If you want to know about the Great Lakes fur trade, there's a FANTASTIC source.
Lot of Dutch guns in this area, too. Something to consider.
PS: There were short barreled trade guns, but they seem to have come around the 1790's from what I have read when the fur companies who traded in them said that the "indians prefer a shorter barrel"...of course, that meant around 30" as opposed to 42". As the NWTG made its way west, they seem to have wanted the shorter barrel for ease of use and loading on horseback. I'll look up the reference, but I read of a buffalo hunt in the 1830's where the writer describes seeing the whites and Indians loading their "fuzees" on horseback by spitting the ball down the barrel and then ramming the but into the saddle pommel or their legs to "seat" it...any questions why stories persist of Indian trade guns exploding, folks? Perhaps because when you don't seat a ball, your gun becomes a pipe-bomb!!!