My players wound up going north of the Nordhiemers. They ran into a taiga like setting inhabited by Tlingit type North American Indians. Beyond that, they ran into the North American Inuit types in the tundra. I would have used European arctic peoples, but here in the US, there is just so much more info on the native peoples of America. The S&P article on the Sami came out too late. If you do your research (and there is plenty of material), you can come up with some good North American stuff. You'll have to work on the Shamanism angle. Also, plenty of monsters available in thier legends if you like to use that angle. The Tlingits were pretty warlike, even beat the Russians a few times when the landed.