LNI R&R Theme?

In very strong contentions for the "theme" of LNI R&R is the area around Alaska and Canada's Yukon territory. A popular narrow gauge railroad (actually several) existed in this area, one of which is restored and running as a tourist line: White Pass & Yukon Route (wikipedia).

This would theme the layout around ore freight and passenger traffic. The palette of the theme would be darker greens and browns perhaps. I'm getting a lot of positive reaction to the idea of snow? Oh what am I getting myself into.

Here are some creative commons shots of the railroad and area: