That sounds like a great hunt. If I was in your shoes, it would be an easy choice. I have a .300 Win Mag that light and accurate. I would be working on the right loads for that hunt, with the possiblilty of a bear in mind. Now, if I was going after the big bears, I'd have to take my .375, but it's a lot heavier than the .300 Win Mag. With the right loads the Win Mag is an effective and adaptable round.

DF