Alaska's weather can be nasty but with care a wood stock and/or blued barrel will survive no problem.
Agree. When I worked in AK, we had stainless Marlin .45-70's with synthetic stocks, but those were selected mainly because they spent a lot of time mounted in a boat and were always being sprayed with saltwater (also for protection, only, obviously). If you're primarily hunting the interior or away from the ocean and take care of the rifle, you should be fine with a traditional wood stock/blued steel.