Handguns are ballistically inferior to long guns in every way. But a sidearm can be with you in situations you'd likely otherwise be unarmed. The meta-studies have shown that if you have time to deploy it during a bear attack, a handgun will probably save your life. I suppose some folks can carry a long gun all-day, every day and it seemed to work for Lucas PHRASECENSOREDPOSTERSHOULDKNOWBETTER..
But I don't think I could always have a long gun at the ready 24/7 while hiking and camping. It seems like moment you lean it against a tree while you "use the facilities" is likely to be the moment you need it.
When camping I generally rely on a 12ga shotgun loaded with
Brenneke Green Magic slugs. But I will always have a sidearm on me, too. This used to be in a HPG Kit Bag but as much as I like the Kit Bag, it's great as a pack but mediocre as a pure holster. So now I usually carry in a kydex chest holster. In the past this has been a 9mm loaded with 147gr hard cast- not ideal but it's the best option I had. About a year and a half ago I got a .40 cal so now I plan to carry it loaded with 180gr hard cast. If I had a 10mm or .44 Mag I'd carry it but I don't and don't really have the budget for a new gun right now (been on work comp for a year and not sure when I'll be cleared to go back to work).
I think the meta-study shows that if you can get to a centerfire handgun your odds of survival are pretty good. A .22LR can certainly kill; Bella Twin killed the largest grizzly ever taken at the time back in '57 with a handful of .22 Longs, not even LR! But she was hiding under a brush pile and was able to shoot up through the roof of the bear's mouth. A .22LR, especially out of a handgun, won't reliably penetrate the skull of a bear so I think it's smart to tote something bigger.
That said, I agree that if you can always have a rifel in
.45/70 Government on you that would be better!