RE: Need new gun to replace 270 "help"
I'd suggest getting a .300 magnum or a .30-06 so that you're covered when you finally get to come up here for moose and really big bears. By then you'll be comfortable with it and shoot it well, rather than going through this whole process again and having a new rifle that you're unfamiliar with. While it's certainly do-able, I wouldn't suggest anyone come to Alaska with less than a 30 caliber.
"Beware the man who owns but one rifle for he knows how to shoot it well."