Yellowknife
WKR
I work in brown and black bear country. To use bear spray I would have to pay thousands of dollars to charter a freight plane. For some locations that plane would end up being a C130. Just for a can of bear spray.
I can take a firearm any where for free.
I also work in bush Alaska on a regular basis. As Ray says, traveling with bear spray can be challenging. Most small fixed wing or rotorcraft charter companies will let you bring it IF it can be stored outside to aircraft. Some will let you bring it inside the aircraft if it's sealed in an airtight secondary container (mil surplus ammo cans are popular). However, if you are traveling on a regular scheduled flight to a village, both of those options are usually non-starters and it would have to come on a freight plane.
The flip side is that some clients are (justifiably) wary of having any random worker in the field with a gun. Some people are scary with weapon! To combat that I am certified as a "Bear Guard", have a CCW permit, AND often have a clause in my contract that allows me to carry.
Bear spray certainly has it's uses, and I recommend it to people on a regular basis. There have been several times I would have used it if I had it. However, it also has the many drawbacks that have been mentioned in this thread.
Yk