Yes, cartridge selection is the least important part. I reckon most people overthink things when it comes to selecting gear for Alaska. I know I did for my first Alaskan trip. I had tages for Dall, moose, brown bear, bg caribou and wolf. Considered 300 Win, 375 H&H, 30/06. Thought about magazine capacity ( thought an extra round in the magazine might be useful
) thought about rifle weight, bullet weight and type. Ammunition availability in country. And, surprise, surprise even asked the guide/ outfitters..,,.who said “300 win goes well….if you can shoot it? )
In the end I chose the always correct choice, the 30/06. Blaser R8 professional, no bi-pod fitted. Went with the tried and proven 180 Nosler partitions loaded in Federal Supreme factory ammunition. ordered 400 rounds, fired off about 300 in practice, from field positions. Knew where she shot out to 500 yards, with the scope…zeiss 1.5 to 6. Had a back up Aimpoint H1 which I’d shot out to 300 yards and the iron sights were zeroed for 200 yards and tried from 25 yards to 200 yards.
Anyway, thing is I probably could have taken my Sako 85 Finlight in 308, with a 4x Kahles and premium bullets and achieved the same result.
I reckon we need to pay more attention to fitness, marksmanship and boots than we do to cartridge selection.