carried a 270 win or wsm for most of my sheep stuff, killed my last one with a 6.5 Grendel, the rifle choice for me has nothing to do with bears, rifle won't be ready quick enough most of the time, maybe once in the hand on a stalk or kifaru gun bearer but pack in and outs rifle is often in pieces in my pack, or where we live with all the sanctuaries/parks we have to go through we have to be encased and unloaded all the time anyway, so you have bearspray on the shoulder harness always at the ready and you sing to yourself while hiking in the dark or on the move through some sketch country, my singing is awful enough I didn't have to deal with any surprises, well, I smelled something once about the same time I got the huffs and was able to back out without incident but everything else had plenty of time seeing them from a distance, don't be a stealth bomber out there if you're a solo artist, sing, tell stories, etc.
and earplugs and Benadryl to get to sleep at night in your little bear sandwich, you'll never feel more alive than that lol