I saw something on the web or on a news program once about this trading post that is being forced to move forward with modern civilization and upgrade there store to be something more of a General store or to compete with Wal-Mart or something of that matter.
Anyway they said that they were the only trading post out there for over 100 years or something like that. They claimed to have had all kinds of famous cowboys and stuff go through there.
My suggestion is that you try and locate the trading post and see if they have a registry and perhaps you can draw on that.
Just a suggestion though.

Hmmm? Who would have thought that watching a TV show about the north would someday help somebody find long lost relatives? Well hope it helps, good luck.

Funny thing is that I requested to be removed from this notification and for some reason this one still got through.
WOW!