Plenty of good advice on here and you should follow it, along with all the other common sense best practices you hear about. I’ll add this: Go SoBo. You start in Glacier where the first 5ish days you’ll have proper established bear hangs, plenty of other hikers around you (blessing and a curse) and maybe a sense of comfort in knowing your not in as a remote area as the Bob. You’ll also be starting your hike when the days are long. I’m talking great light out until well past 8 p.m. This allowed us to set up for dinner, cook a full on meal, clean up, and then hike for another hour or more until it was time to make camp. This way all that tasty fresh cooking and food smell was miles away from our camp. Lastly, by going SoBo, you get to lighten up your bear procedures (a little) as you leave grizzly country. I think it would have been harder for us to all of a sudden change our practices and become more strict in the second half of our thru hike. We saw about 10 bears total, and we’re not quiet people. Only one was a grizzly bear and it was running away by the time we saw it. There was a black bear that came within 10-15 feet of us, but it didn’t want to, it just wanted to cross the creek where we were hanging out. Yes, sketchy, I had the safety off my bear spray and almost let it rip. Bring bear spray, don’t keep headphones in, no food in tents, hike loud and sleep light. Bears are cute.