Putting up pelts

[dell]

So I've read different inventories and anecdotes of various pelts (muskrat, otter, raccoon, mink, etc.) other than beaver being traded to fur companies. I get the impression that this was often from trade with Indians, but I also imagine that some of these critters wandered into a beaver trap now and then and a trapper likely put them to use for their own food, clothing or traded the pelt along with their beaver plews. I am wondering if anyone has read any primary sources about how such pelts were prepared for market?  I have not found any information about this in my reading. Were they case skinned and stretched on rough boards or bent willows similar to modern methods? I have been preparing such critters in this manner and I'm wondering if a Rocky Mountain trapper would have prepped them similar to the way it's done today. Any thoughts? 
Thanks,
Del

[luke]

This is years prior to the RMFT, and in Kentucky, but does give the process for otter skins, very much like today. "The beaver skins were stretched within hoops, generally of grapevine, and dried. First the skin is ripped from the underjaw down in the skinning. The otter skin is taken off cased, that is, ripped off whole; a bow or drying board is run into the skin after it has been turned inside out."

. My Father, Daniel Boone: The Draper Interviews with Nathan Boone (Kindle Locations 399-400). Kindle Edition.

[dell]

Nice! Thanks Luke. That's the sort of info I was looking for. Much appreciated.