The op is not hunting bear but defending from a possible bear attack. I carry a Kimber Pepper Blaster. 2 shots that are not affected by wind or rain. Short range though at 3'-13'. Very compact and light. I usually also have a 357 loaded with hardball. I would rather have something bigger. It would be difficult to carry a shotgun in the areas I go, mostly because of people, but there is always a shotgun next to my bed in the RV. In Alaska I carried a 12 gauge or a rifle. The short barreled 454 Casull revolvers have proven themselves and are popular up there.