REALLY depends on what you are doing, as for bears, it's a overstated risk, even with 3 maulings in a week, you figure that you have MILLIONS (2-3 times the population of the state comes and visits every year)
at east 2 of which were oblivious, sorry but taking pics of a bear posturing -> hint, walk, don't run away... the other was a uni student heads down collecting samples.
what you need is a gun YOU will use, buying some 'gee williekers, best durn gun...' don't worry about it, if you want something exotic bring it, just may sure you bring ALL your ammo, too. Secondly, a few moose and caribou IS NOT SUBSISTENCE, those are the people in the bush, and trust me, in season they harvest more that that in a DAY. they live hand to mouth and it takes more than that to make winter. there isn't a best round, now that said, you will find everything, but Caribou, a guy who does live the subsistence life, he uses a Mosin Nagant, seems to work fine. MUCH more about your than what gun you lug.