OregonJohnny: "I don't think either the Beretta 92 or the 1911 are particularly good choices for wilderness survival, or for protection from anything larger or more dangerous than other people."
That is location-dependent; the people I happen to run across in the Maine woods tend to be a lot more stranger-danger than the four-footed critters.
No handgun in the world will stop a moose; your only defense if you tick off a rutting moose is to run for your life, climb a stout tree and settle in for a long night. The black bear are pretty small and peaceful. They are, however, rather quiet, so it is possible to surprise one. Cougars are out there, but few and quiet. The coyote wait for you to get lost and die. The wolves -- well, I've never actually yet met one in the Maine woods, and I strongly suspect a lot of wolf sightings are actually feral dogs, but a Beretta 92FS ought to drop a wolf. I hope.
Now as to people, you'll find lots of technically homeless seasonal loggers, plenty of stoned campers, a few illegal growers, and the occasional outta state body dumper (ever see Miller's Crossing? That's an actual southern Maine town, by the way, just off old Route 1). Beretta 92FS will deal handily with any, though I'd feel even better with a rifle, the carry of which, however, brings with it certain hunting law implications.