I have never been to Alaska yet. I live in Washington state. I have a Burris Euro-Diamond 2.5x10xx44mm objective with the Ballistic Plex retical.Scope has a 30mm main tube.2x works really good in our thick timberelk area while 10x is good enough to shoot deer at 600yds. in the open wheat fields. I really like the Ballistic Plex retical. It matches your cartridge with bullet weight and velosity plus or minus within so many inches. Good enough to put a round into the boiler room of an animal. Mine is calibrated plus or minus 2" up to 600yds. and at 600yds. 6" low. Scope is clear and bright. Good in low light conditions. And is backed by Burris's forever warranty.