I spent 33 years in Alaska and have been from the Alaska Penninsula to Pt Barrow, Alaska, including the brooks range, Kotz, Nome, and a lot of other villages in the bush. For the most part I carried a Ruger Super Blackhawk 5-1/2". I carried that because I've used a Single Action gun for 50 years and they point well for me. Apparently anything you take will be new to you. To correct some misunderstandings. No gun you take will protect you from bears. It's the bullet you use that protects you. A good 305 grain HARD CAST like Buffalo Bore will do very well. I prefer the 305 to the 340 grain hard cast it's easier to handle. I also prefer a gun with a 4" barrel or more, but much longer isn't necessarily better. I know people who have used the Alaskans on bears and been successful with them. They shoot very well. I've got all three. You don't have to use a 454 Round in the 454 Alaskan, use the Buffalo Bore 45 Colt in it. 325 grain Hard cast is a substantial load. Plus the recoil isn't very bad on it and you have plenty of time to get back on target. That is important. To protect your self you need to be able to hit your target and that comes with practice and even then you have a bear that will be moving and you need to plan on firing multiple shots as necessary. I haven't used Corbons but have no reason to doubt their effectiveness along with other brands, but in Alaska Buffalo Bore is very common.
Importance is having a reliable handgun in a reliable Caliber 44 Mag or larger.
Use an appropriate round in your revolver, An empty gun won't help you at all.
Have an adequate holster that means you will carry it everywhere. Diamond D Guide Holster is one of the best. They are in Wasilla and if you let them know you want to buy one from them they will have it ready and adjust it to your body and show you how to use it.
Practise, practice, practice. A miss is very ineffective. Learn to use your gun. If you are right handed and you use a Single Action gun, learn to cock it with the left thumb while your are recovering from the recoil and getting back on target. If you are using a double action, you still need to practice getting back on target. CAN YOU DO THAT??? If not get your self a rifle.
Watch this and see how you do. You don't need to start that fast but these men know how to handle a handgun. IF you can't, use a rifle. Most people can shoot better with a rifle than a handgun. Handguns are handier for sure.
https://www.americanhunter.org/articles/2014/7/15/video-the-454-casull-challenge/
Thanks for the link Max.
Edited to add Gramps is right about moose. Several people have been stomped this year by moose. Bears make a bigger head line, but moose are just as dangerous. They have been known to kill people kicking them to death. Wild animals are just that, WILD, and unpredictable. You don't say where you are going, maybe I could give more specifics.