Do you know how to tell the difference between grizzly scat and black bear scat?
bells and pepper spray in the grizzly scat.
But I also agree ( as does one of the references I posted above - see reply 75 ) that it wouldn't hurt to have a gun as well, IF you feel you're capable of hitting a fast charging bear and IF you're premitted to carry one in the part of bear country you hike, camp, or live in.
...and small caliber handguns.