Re ammo availability, yes, .44 magnum ammo is available darn near every where. Re finish choice, stainless is easier to maintain than blued, although I never had any trouble with any of my blued firearms rusting, because I cleaned them thoroughly, and as often as they needed it. August is generally the wettest/rainiest month; May is usually driest/sunniest. Periodically you'll need to remove the sideplate of your chosen piece and make sure the innards are free of rust or, as you head into winter, ice. Snow melt or rain can get into the workings of a revolver (or any firearm) and then freeze, so you'll want to keep it dry if possible and use a good quality lubricant which maintains its fluid state well below freezing. Most folks don't appreciate how cold it can get up there. Unless you've experienced it, it can help to think of the temperature this way - when you're out hiking on a clear winter day at 30 below, that is 62 degrees below the temp water freezes. (If you're a runner or cyclist, you'll need to learn how to protect important external parts of your anatomy from frost bite.) Alaskan gun shops are full of large caliber handguns and rifles; two shops in Anchorage I used to frequent were Great Northern Guns and Wild West Guns. Both had great folks behind the counter. Remember though, it's not the bore size or the foot-pounds that gets the job done, it's where you apply the power that's critical. Your target will be moving, light may be poor, and repeat hits are likely to be needed. The big boomers are powerful, but there are trade offs for that power, the biggest of which is recoil and hence a slower second and third shot, plus less pleasant shooting than is ideal, which too often leads to little or no practice with something you're betting your life on. When I carried my 29s, I generally had them stoked with 320grain LBTs over 22.0 grains of 296 (start 2 grains lower and watch for pressure signs & BTW, I'm not endorsing this load for you or anyone else, it's just what I used). Alaska is a wonderful place; enjoy!