I've only seen one Grizzly. It was from a rest area on I-90 somewhere between Missoula, MT and the Idaho state line. The bear was at least 100 yds away, across a river, with a 6' chain link fence between us. It was still too close for me.
Black bears were frequent visitors around our place in Colorado and I frequently saw them up close and personal. They never bothered me. I don't care to be eaten by a Grizzly, though. The damn moose up there are almost as mean as the Grizzly bears.