1820's isn't all that long after the war of 1812. I live north of Kingston,Ontario and opted for a Chambers officer's fusil
[English ] . It has a cherry stock and is in 20 bore. I don't personally believe that there were that many "Bess's " in the farmer's hands since the firelock remained the property of the King. Perhaps an older style Bess [surplus ??]
I'd stick with a plain but decent quality fowling gun. A lot of us "loyalists " , including a whole lot of Scots ] ended up with acreages of woods and rocks. It was a tough life trying to farm and keep body and soul together. This is Canadian shield country, and it's still pretty wild. Coyotes and wolves , raccoons, fishers, owls,bears...it seems that everything wants to snack on what I'm trying to raise. I can't imagine a rural fellow not owning some king of gun. And, there were gunsmiths in just about all the towns around this entire area. No need for gunsmiths if there aren't any guns.