I would take along a LARGE caliber, long barrel magnum revolver(think Clint Eastwood) with waist holster in order to keep my hands free for other uses. Lighter and more ammo could be carried. As far as bear spray goes, if I was faced with a charging bear and had the choice of using my magnum sidearm or my bear spray I would choose door number 1. My life is more valuable to me than the bears. Let them arrest me.
Regardless of what you choose, if your not proficient with shot placement nothing is going to help.