Don't forget the Museum of Natural History in NYC. They have an extensive collection of aboriginal canoes and kayaks which they collected from around the world. I got a private tour of their store rooms back in the early '90s and was quite impressed. Their collection consisted of mostly dugouts and skin on frame kayaks but I do recall a bark boat or two.
Here's the link to an article entitled, "Life's a birch for rare aboriginal canoe" in our loca paper (Hamilton Spectator). It includes more info about the provenance, as well as the Canadian Canoe Museum and Museum of Civilization (in Ottawa) where it is currently on display.