This is tricky.. On one hand, it's such a giant pain in the neck to carry around a pistol, that I rarely do it anymore. I'll carry if I'm in known or fringe grizzly habitat I will, but didnt even take a pistol on my last trip in the Bighorns.
On the other hand, a few years ago, in fringe grizzly habitat, we were camped off a trail, and came down one day to get water. A group of guys had set up on the trail and were going to camp there, just a few hundred yards from us. When we told them where we were, and that we were hunting this, they got pretty belligerent, one of the guys in particular. He clearly felt he owned the mountain, cause he had hunted this area for 10 years or whatever it had been. It started to get to the point where it looked like he might want to fight. My buddy and I had pistols, as did the guide that was camped up the creek from both of us (not a guide for either party involved). We defused the situation, and told the guys that we would just move on and hunt a different drainage, even though we were there first.
When we left, I was really surprised that the guy hadn't tried to fight us, but then realized that the pistols in clear view probably dissuaded him quite a bit. Or, maybe not, I dunno. I just know there was no fight, noone got hurt, and I killed a bull 3 days later.