In my almost 50 years of hunting here in Montana most of my hunts except some deer and antelope have been in grizzly country. Most of those hunts were either backpacked in or I/we used my horses to pack a camp in.
Only one of those hunts had a bear incident. Three of us were camped at the end of a Forest Service road near West Yellowstone. We had the quarters of two bull elk and a bull moose hanging in the stock rack in the back of my pickup.
One night a black bear tried to steal one of the backstraps from one on the elk. We heard the commotion and ran him off without the meat.
The next night I went outside our tent camper to check my horses, and a grizzly woofed at me from the top of the road cutbank next to our camp. He was woofing and clicking his teeth at me, so I fired one shot from my Ruger .44 mag over his head. It didn't phase him. So I fired another shot into the tree next to him. Again it didn't phase him.
So I holstered my pistol, picked up a golf ball size rock and threw it and hit him. He then ran off into the night.
There was another hunting camp about 1/4 mile down the road from ours that also had an elk hanging. He apparently went to their camp as we heard 5 or 6 quick pistol shots from their direction. Forty five minutes later we saw their headlights as they left.
The next morning I saddled one of my horses and followed the bear's tracks from our camp. They went straight to the other camp, then from that camp there was an occasional drop of blood in the snow. He went to the far end of a timber clearcut, then headed back toward our camp.
We then gave up on a third elk and broke camp and went home.
The grizzly had a radio collar and an ear tag, and when we reproted the incident to FWP, we learned that he had been a problem bear near Cooke City, had been trapped and release in the area that we were hunting.
I later found out that the Grizzly Study team had tracked him to his winter den, then the following spring they found his collar.