Lots of bears where I live. Sure the spray is around and so are other means I may sometimes leave by the door.
What I like best is the airhorn, if just to see them bears run away. Works well on all sorts of critters, including the neighbor's dogs and truckers on the jakes in front of my house at 06.00AM.
What's good about the airhorn is that you can clear the area even if you haven't seen any bears yet. And also in case you get in trouble, you can summon help with them. SOS is....
No worries I know what it is, loud enough at work...!
Personal defense with an airhorn??? Release that within a few inches of someone's face or ears.......they'll stop what they are doing.