Thanks for all the great help everybody. I'll start looking around with those. It's nice to know that Stephen Foster is time-appropriate, because it would be nice to do some songs that the tourists would know.
Susan, I'm speaking of Black Creek Village, not Upper Canada Village. They're basically the same thing, but in different places. Thanks for all the links.
Rick, Poor Little Girls of Ontario is actually one of the ones I was thinking of. I heard it on some "Folklore of Canada" CD.
Jon Barlett, I know that accompanying myself with guitar wouldn't be that "period" (and I think I may feel a little silly dressed up as a pioneer playing "Four Marys" on my shiny Taylor acoustic-electric) but I don't know if I have the guts to do more than one song with naked voice.
Ian, Barry, your suggestions sound really interesting too. I'll take a look.
Marion