Where I hunt isn't that far from the Yukon. In fact, our caribou herd intermingles with their's.
The Ruger Redhawk and Super Redhawk is pretty much king of the hill up here. The big X frame Smiths are a runner up. I think, in Alaska, the debate is more about which caliber is best for bears, rather than which gun. (The vast majority of guys go for DA revolvers, although a comparatively small number will go for the 10 mm Glock or a 1911 converted to 460.) 44 magnum seems to be the mutually agreed upon minimum. It's a trade off between enough stopping power and light enough recoil to shoot effectively. .454 seems to be a popular middle ground. The only other debate is whether to carry the heavy Rugers or the lighter (much lighter) scandium Smiths. (Then you get into this whole debate about long-term reliability, etc.) It is also pretty much mutually agreed upon to shoot heavy, hard cast lead WFN type projectiles, either handloads or, for commercial ammo, HSM Bear Loads or Buffalo Bore. No one is carrying anything under 300 grains or anything with a hollow point.
To answer your question, I carry a Redhawk in 44 magnum. However, ammo cost and availability and the fact that I have a lever gun in the same caliber influenced my decision. I have handloads with 310 grn WFN projectiles, but I also own several boxes of HSM Bear loads in 305 grn WFN.