For those who were able to qualify for carry permits in the bush, the minimum was factory 10mm or .357 magnum.

Same here in BC. More sightings all the time. Moratorium on shooting them now, and they are prospering, but were increasing in numbers dramatically even when there was still a "hunt".
Back 8-10 years or so, when guiding & camp protection, I went for a drive on the logging roads to find some paper birch bark for fire starter. In 3 hours, I saw 5 grizzlies, only one a cub.
There are a LOT more now & they are a constant worry for me, as my wife is a hiker in a group and non of them are armed. She's the oldest, but I don't think she's the slowest.