I've hunted the Bob Marshall, and used a solar powered electric fence at night for peace of mind. My partner and I separated one evening, and he was charged by a mother grizzly that had two cubs. Luckily, he was able to spray her at 10 feet and she retreated. I've never seen someone more scared/traumatized in my life.
Needless to say, it definitely had an impact on how hard we hunted the remainder of the week.
Been in your partner's boots, experienced his mindset. Stick bow hunt, 1985-37 years ago. NW Montana.
However I came back to camp, told friend hunting with me that I was leaving and never coming back to NW MT. Having witnessed the charge from 300 yards above me on a ridgeline, He agreed.
We packed up and hiked out that afternoon. In hindsight, with all the grizz sign, scat around, we should've moved several miles to another area. But the elk were there, so was Grizz.
Although tempted over the years, never went back. From what I read, many more Grizz now than back then.
In WY a few years back, it was find elk/find grizz signs, move to another area, find elk/find grizz...repeat.
We experienced several grizz encounters, but from a distance. 1 bluff charge that bear stopped 60 yards away but that ol' chill went down my spine.
My buddy in hunter's heaven now a couple years. I will not hunt solo in grizz country.
The hunting solo would be challenging, ever try being bear aware and elk conscious at the same time, not EZ.
Be alert when calling elk, mixing in calf calls may be ringing the dinner bell.
After the shot, solo meat processing sequence is roll the dice, odds in favor of Grizz house.
IMHO, get as much prime meat packed out the 1st trip, the first might be the last meat packing trip.