My nephew, who lived in Ketchikan, has offered to take me bear hunting on Prince of Wales next May. He suggested that in addition to bringing a rifle for the hunt, that I should bring a handgun as a backup just in case. The only handgun, other than a 9mm that I own, is a Ruger GP100 .357 Magnum with a 6" barrel. Is that potent enough for the bear located on the island? Do I really need a backup gun? I have hunted deer, elk and antelope but I never have hunted bear nor have I been to Prince of Wales so any suggestions will be much appreciated. Thanks.