If I was routinely hiking where bear or cougar or whatever, oh my was a possibility, I would echo Dargo's sentiments. I would want a heavy caliber (.357 magnum minimum) revolver or semi-auto AND a hand cannon...something akin to the Model 500 he mentioned. But that's just me....
I've never been eaten by a bear or cougar, but my reading of accounts of those that have suggest that you probably don't have much of a chance to have a need for more than a couple of shots let alone 2 guns, but you do what you want, especially if it's your way of justifying another gun purchase.
To the OP, need to figure out for sure if wanting to carry concealed in public, or just to carry in the field for critter protection or both. For field a simple .38 or .357 revolver in a Taurus, S&W or Ruger would be a great fit, a smaller frame revolver would do double duty, though the airweights tend to have a pretty sharp recoil, or a .380 3AT/LCP/TCP/.380 Kahr would work for deep conceal, or a PF9/709 slim/PM9 would conceal and do most of what he's doing.
Most folks won't venture far enough from the pavement to run into the monster grizzly's, and few can shoot a .500/.460/.454 whoominboomer well enough to accomplish anything. A beginning shooter would be best advised to pickup a smaller caliber, learn to shoot it well, learn to be very comfortable with its capabilities, and with the gun that shoots it.
I dislike heavy recoil, but I work with what I have. I shoot a .357 out of a Ruger Sec. 6, but rarely do, I carry it with .357's but usually shoot .38's. I've also got a Mark1 .22lr that will ring a 12" gong at 100 yards 7 out of 10. I won't claim to be able to kill a charging grizzly with it, but I don't need to, not sure our guy here needs to either.
Most encounters, the flash and roar of any gun shot would likely deter many large cat/small bear types, and if a bullet were well placed, would finish any motivation to eat the individual. I'll take well placed over big and loud MOST of the time.