I can say, having a good number of native friends and working in Northern Quecec near Hudson's Bay, that most traditional handwear for winter are made from animal hide, usually deer, bear or moose (utility), wolf or fox (more decorative). They would be built with the hide out and fur on the inside. They could be mittens or mittens with trigger finger and almost always had long gauntlets. There may be decorative bead, quill or paintwork.
If you can wait a day or two, my close friend has a pair of moose hide gauntlets with some beautiful beadwork on them... I can take a couple of pics of them and post them in this thread. A really nice example of handmade native mitts from the reservation on Manitoulan Island in Northern Ontario.
Colin
) could categorically state that no mountain man ever in the entire history of the period did or did not have mittens like that I'd go with what ever you want after all they were famed for being individuals apart from the common herd, if all else fails you can go with the wraps 
Hello Ken, Try this on google: (images of original mountain man paintings) There are hundreds of paintings and photos of mountain men wearing all types of mittens and gloves. You may find something that fits your needs. Regards, SG
