My suggestions, .45 and the 12 gauge with some mixed birdshot, buckshot and slugs. If you handload I like 185 - 200 semi wadcutters for small game, rabbits, squirrels, snakes and such, fmj for all around use, and hp's for blowin stuff up, or personal protection. In the 12, I would load 3 rounds, 7 1/2 shot, and depending on the laws there, 2 rounds of slugs, that gives you, 3 rounds of field expediant, ( small game ) and 2 rounds of serious, + if you feel the need, jack those 3 rounds out and put in what you think the situation will take. If you don't have to pack 3 guns, this is my advice, if your excursion allows for some target shooting, and not carrying 3 guns up a mountain, take what you like for the 3rd weapon.