I started working on the Nantel here in Quebac and I was reading the mesages on this board whe I came across your message. I don't have the answer to your search but I have something on the métis possibility.
Here is what I have found in the past on my Corriveau Board. The metis story is in fact a story. When the Canadians (quebeckers) crossed the border, if they were saying they were french, they were treated like slaves cause they have lost the war to the England and refused to join them in their war against England.
So, if they say they are indians, they were not boderd and treated like civilised peoples.
This is what I read and it could be tru cause we have the same story in all the families who emigrated to the US.