First rule of thumb is to be an effective shooter. Most guides hate the folks who show up with a new uber-magnum DU shooter that they can barely shoot. They would prefer for you to show up with your 30-06 with effective loads that your used to shooting. If you can handle 200 to 220 grain loads in your 30-06 you can take anything that walks in Alaska.
Second rule is the rifle, just as I stated above, if you can handle it, and are a decent OFF THE BENCH shot with it, you'll do well, and the guide won't have to worry about you wounding an animal he is responsible for putting down(Guides hate to have to go after something like a Moose or Brownie thats been wounded).
Third rule; Don't get carried away with all the the new out there, eskimo's go after polar's with 30-30's, a good medium weight 30-06 thats will shoot decent groups with any load from 150gr to 220gr is more than enough for 95% of your shooting.
Second rule is the rifle, just as I stated above, if you can handle it, and are a decent OFF THE BENCH shot with it, you'll do well, and the guide won't have to worry about you wounding an animal he is responsible for putting down(Guides hate to have to go after something like a Moose or Brownie thats been wounded).
Third rule; Don't get carried away with all the the new out there, eskimo's go after polar's with 30-30's, a good medium weight 30-06 thats will shoot decent groups with any load from 150gr to 220gr is more than enough for 95% of your shooting.