My cooler ran me $20, it has been to AK about 25 times, and has never failed. Weighs about a pound (all plastic model). Since it is so well insulated, I never have to add 5lbs of dry ice so I am actually able to bring back more fish than someone using a wax box with dry ice.

Now, the real trick, load that baby up with beer, bottled water, candy bars, nutra grains, coffee, and whatever else you want so you don't have to pay double or triple for it up there. Make sure you say it is all non-perishable when checking in. My cooler weighs 70 lbs. on the way up, and 70 on the way back down. The nice bonus is you have with you what you want, and are not at the mercy of the food store in the area you are going to. We bring a few fresh apples and other fruits to, which are hard to find in some areas up there.