As this thread has morphed into a 'gun or not' direction, I might also add a few additional thoughts.
You need to understand that your bear risk may be very low...or not. It depends on where you are hunting, and how familiar the bears are with human contact. Bears are curious, but their tendencies are to avoid contact with unfamiliar situations. If they almost never see or smell a human, they are far less likely to present a problem. Bears that are frequently in contact with humans do not always share the avoidance mentality, and may be willing to assert some 'authority' in an encounter. Know your bears and the risks, but also know that nothing is 100%.
If I felt I would be in an area known for risky bear behavior, I wouldn't carry my big pistol...but would opt for a bigger pistol or a stocked gun. No gun being perfect, I'd realize that a stocked gun is harder to carry, slower to access, and more cumbersome in tight quarters. Where I moose hunt, we do see grizzlies but they are extremely wild and not at all habituated to human activities. I feel well-equipped with my laser-gripped Smith & Wesson revolver. Better than spray, but not as potent as some weapons. The statistics favor never getting scratched by a bear. The gun is insurance, and an aid. I selected my specific weapon because I knew I would carry it every single day in the bush. A weapon left in camp is a useless weapon. Your best weapon however? That would be knowledge of bears in the specific area you'll be hunting.