You can hunt moose in Idaho and Wyoming as a non resident, I'm not sure about the other states that offer moose hunting, but I think most of them allow nonresidents to apply.

30-06 has taken everything in the world. Jack O'Conner used to write about the virtue's of a .270 for many years and took everything on the planet with it, the .270 has less "juice" than the "06", Now for the best part , not only does the"06" have light recoil but the ammo is some of the least expensive out there, and available everywhere, in many different weights and loadings.

Yes, a 30-06 can do it all in competent hands, and most situations.
You hunt bears, particularly BIG bears, enough, you will inevitably find yourself in a situation where you wish you had major fire power.
I hunted with a great 30-06 Remington Mt. Rifle, (one of the very first built), for over 20 years, and took many, many animals with it, including my first brown bear.
That said, if I was looking for a single rifle for Alaska, that wouldn't be my choice.

I like my .300 Win Mag. It's taken most of Alaska's game, except for a big bear. For a big bear, I'd prefer something heavier.

Let's hold down the voices on this "one all around rifle" business. If my wife hears that, what might she do with my gun collection?

Jim

Definitely the .35 whelen out of all of those. Col Townsend Whelen hunted a lot and invented the .35 Whelen. Its more powerful than a 30-06, and will kill the first elephant, and knock down the other 2 behind it.

I would go with 300 PRC. I have killed 2 elk, mule deer buck and 2 whitetail does with mine this year. It really hammers them with 212 gr ELDX.

Good luck finding ammo for 35 Whelan or 300 PRC in Alaska. Luggage does get lost or arrives late, especially to the hubs. If there is any local ammo, it's likely to be a common caliber.

There nothing wrong with the Marlin 45/70 I would use that if I lived there. It proved that it can kill the big bears.