I made a few trips fishing and hiking in Denali, both on north side and the south side, north of Talkeetna, plus some time south of Fairbanks. I also rode a fishing boat up from Seattle to Anchorage and did some hiking/camping/fishing in Chugach, Katmai, and Clark parks.
I carried an 870 Police or an 1895 Guide Gun on each of those trips, and had a 44mag Super Blackhawk on me for half of them. I would take a 5.5” 454c Super Redhawk loaded to around 50kpsi on my next trip - again, carrying the 1895. There are just too many times I set down the long gun for me to be comfortable without the sidearm, and I’ve typically carried a belt gun any time I am outdoors for the last 25yrs+. But the long gun really is the lifesaver, the sidearm is a last line. Two is one, one is none, as it were.
I typically take only the belt gun any time I am hiking/camping/fishing in grizzly country in CONUS. When hunting in grizzly country, I do keep my sidearm, again, as backup, for my hunting rifle. For black bear country, I only have my sidearm as well, but typically I’m carrying it with 2 legged predators in mind, not bruins.