Used to live in AK myself.
Take a look at the 460 Rowland at Clark's site. Ballistics similar to the 44 mag. I don't know 45 super ballistics. They may be similar or even better.
You want a solid lead bullet. Penetration is key.
The Clark conversion was reviewed in Am Handgunner some time ago with reloading tips also.
I go there every summer and am tempted to get one as I'm fastest with a 1911. Easier to carry than a .44 mag also.
All that said, .44 mag is pretty marginal against mr Brown Bear. Better than nothin though. Sad fact is that a rifle is hard to keep close enough to be available when you need it, especially if you're fishing, etc.