It's funny how this subject always draws out a lot of "passionate "discussion".
When I first got to Montana many years ago, I bought a Ruger Redhawk 41 (beautiful gun, loved it) for the express purpose of bear defense while fishing in Griz country, usually the Dearborn River on the Eastern Front. I lived n Great Falls then. Walking through thick willows in Griz country can be a little un-nerving. The 41 made me feel better.
The more time I spent in bear country, the less nervous I became, and over the years I spent a good deal of time in bear country, especially in the Beartooths, Absorkees, Gallatins and Madison ranges after I moved to Bozeman. Most of the time I did not carry gun or spray and had numerous encounters with bears usually at a comfortable distance, especially when fishing in the Park (Yellowstone).
One interesting encounter happened while I was fishing, hiking up stream on the Yellowstone from Tower Falls in YNP back country. Wasn't carrying anything but my fly rod and my head was down on the trail when all of a sudden I saw a dark blur go by me on my left. It was about a 200 lb blackie in full gallop that passed about 20' to my left. I have fished slough creek quite a bit and about half my trips up there I see bears, sometimes multiple. After a while I decided maybe I should carry some protection as the odds might catch up to me someday. (And BTW, I have had as many or more bear encounters in my back yard as I have in the back country.)
Well back then you could not carry firearms in the park so I got some bear spray. Ok, so reading through this thread so far I have not noticed anyone making the distinction between different types of spray. There is a huge difference. UDAP and Counter Assault are more of a vapor than a spray and they get into your breathing passages and lungs, and mess you up big time. I know this because I tested UDAP myself once. On a calm day I squeezed the trigger for less than half a second and in less than half a second it shot out a burst that went about 30' and was about 6-8' in diameter. Just then a very light breeze started blowing it back in my direction so I retreated until the orange cloud disappeared. Then I walked back to the spot where I originally discharged it. Although I no longer saw any sign of it, I started choking and gagging and became nauseous. I felt very crappy for a couple of hours. These sprays are totally different than the sprays that are basically skin irritants. For any of you that have been through tear gas training (I have), I would say it was similar to that but a good bit more intense. A few years ago, some high school kid thought he would have some fun and discharged some UDAP into the bleachers of a football game. Several people were taken the the ER of the hospital.
So I know a few of you boys posting to this thread and I'll make a friendly little wager with anyone who wants to take me up. My $1000 to your $100, you stand 20' away from me and on the word "go", I start spraying and if you can get to me and grab the can in my hand you get my $1K, if not, I get your $100.
I think my Montana, Wyoming and Idaho buddies will agree that the vast majority of bear attacks in this country happen to hunters, usually bow hunters calling elk. Bottom line, being in bear country is probably a lot less dangerous than driving home from a New Years Eve party dodging drunks.