I have to agree that understanding predators is a far better defense, bears are just more commonly seen so they get spoken about. Moose can be pretty volatile too, and I have seen enough warnings about cougars in the area I travel to keep an eye out for them.
I have 2 simple rules I always check anywhere I am going to camp for garbage and signs of recent bear activity. Either one and I move on, garbage will generally mean wildlife issues -particularly food stuffs that are rotting (seen that more than once). While I will burn if possible and clean up if not, I don't stay there. And fresh bear scat and tracks have the same effect just move on down the road.
The problem with almost all defense methods in the northwest, is you tend to see the animal at very close range. And under 100m is way too close for more than a single shot of anything if you are truly being charged.