The grizzlies are around, but they are mostly nocturnal.
Tell that to the one that followed us for half a km a couple of years back. No tracks on the way in, and when we backtracked on the way out there was a set of dinner plate sized tracks following ours in.... makes the hair on your neck tingle.
Two years ago, a one and a half year old bear went in through the open hatch of a car while the guy was in the front seat eating his lunch. The fellow was turned around, kicking the bear with his feet. The CO we spoke to about it said the bear would have to be put down because next year it would be likely to take somebody's head off.
I've seen bears a couple of times (blacks) and enough grizzly sign to know that a can of spray and a clear head is a MUST if you're going to be fishing up there. I'd second the fact that the elk herd has boosted the grizzly population. Last year I saw two elk kills in the snow. Blood and fur everywhere, meatless limbs scattered around... quite a scary sight when you know that the bear that did it is somewhere nearby. I fished somewhere else that day.