RE: 270 and 30.06 popular in alaska...
I shoot a .338 Win Mag. I would maybe take a .270 caribou hunting, but not for moose, mostly because I pretty much want the moose to drop where I shot it, and not go running into the swamp. My chances of that are better with a .338.
If you were just out hunting, I would think a .270 is okay. Its not like there is a bear around every corner, and even when there is, they are mostly happy to just leave you alone. Now, would I go HUNT bear with a .270 or .30-06? No way, I would take a .338 at a minimum, but more likely a .375 H&H. We'll see though if I draw my Cold Bay hunt.