My thoughts as well, Homer. A .375 would be my choice, or perhaps anything really from and including .338Mag. in a 2 1/2" mag. case or .35 Whelen in non-mag. cases upwards, all with good 250gr. + expensive bullets.

This would be an ugly thing to see coming.

some other pictures.

Some pictures I took while fishing. These are just little grizzlies.

Golfing in B.C.

A 9.3x62 would be Classic - 286gr. Partitions 2,400fps to 2,500fps. My .375/06IMP would work well with 270 gr. or 300gr. Premium bullets at 2,450fps to 2,600fps - Barnes TSX, Partitions, Swift A-Frame - use the Bergers on wolves or gophers. LOL
A .338 Mag. has done well for a buddy of mine who guided for many years. The 200gr. and 225gr. dropped the interior grizzlies faster than the 250's, but the 250's did more total damage & smashed bones whereas the lighter bullets were usually non-bone breaking hits. I would have a difficult time trusting the light bullets, myself, but just reporting what I was told.

Warm, waterporoof gear - GoreLeak (Goretex) is not recommended, seems to me - maybe it's better now than when I guided. Win458 would have better info for you for Alaska.