If this forum is anything like the ones I've frequented in the lower 48, this question has been asked before, and probably many times. But, I'm living in a camper, waiting for a house to close and decided to ask it again anyways.
I carry sometimes. When I was living in Montana I'd carry when I went pretty far off the beaten track. We have Grizzly bear in Montana, though I never saw one outside of either of the two big parks (Glacier and Yellowstone, but they're there). I mainly carried because of mountain lions and black bear... though honestly never ran into either while fishing, but some while camping.
Now that I'm up in Alaska I'm planning to carry more, especially when fishing the coastal areas. I think I'll probably carry in the interior as well, but to be frank I really don't know how prolific the grizzly/black bear populations are in the interior. I've already encountered quite a few moose in my short time fishing the upper Chena. All encounters have been at a fairly far distance, but I saw them and they saw me.
Currently I'm waiting on all of my firearms to be sent up as soon as I have a permanent address. I've been researching some large caliber revolvers for times that carrying a carbine isn't practical, that I hope to purchase in the near future. The Ruger Alaskan in .454 is appealing, though scarce at the moment. The S&W .500 is HUGE, I don't just mean the round but the frame is giant in my hands. A .44 mag loaded hot is about the smallest caliber I'm looking at right now.
So do you folks carry a firearm, bear-spray or just go free-solo? What do you carry (pistol, carbine, what caliber?) and what are your thoughts on loads if you do carry?