Go with an over-under rifle shotgun/rifle combo if you are after meat for the pot.....or a long magazine 10 or 12 gauge pump shotgun if you are thinking protection from bears. You can carry some bird shot rounds and still gather small game and birds with the 12 gauge....get one with a 3" or bigger chamber for magnum rounds for the bears....smaller loads for birds/wabbits.
The only advantage to a pistol is they are light...easy to carry....but nearly useless for true survival uses outside an alley fight.