"I might give Glacier a pass. The Grizz there are aggressive."
NOT !!!!!
I have been camping in the park for 50 years and only seen one bear.
That was from my car.
They keep track of the bears and close anything that is close, The tent camps have 12' high bear fences. You do the bear stuff and you will never have a problem.
Dude, where do you get this stuff from? Interested in this 12' bear fence you mention. Not sure what camping area you are talking about, but I haven't seen it at any of the areas I have been to. I haven't been camping in the park for 50 years, so maybe I am missing something.
You have me trumped on experience, but I will get you on bear sightings. I see them often when visiting. Probably just better eyes.

This one was tough to miss. No crop on this shot.
This youngster liked playing with sheep.
This little guy was about wrestling size. The claws did intimidate me.
I will agree with 45 on Waterton, great place to visit as well. I see plenty of griz in Glacier, but rarely in Waterton. Lots of blacks though.
These black bears were from Glacier. Once again, tough to miss.
Sorry about crowbarring in the bear pics, just bored waiting for the game to start.
Glacier is a fantastic place to spend some time. There are plenty of bears, but that is part of the draw and why I love to spend time there. Lots of great trails, but I haven't done very many due to having my pup. Waterton isn't as stringent on dog rules, so another check mark for the Canada side. I hope they will let me cross the line this year.