I've been continually disapointed with Goretex type gear. It never seems to breathe well enough to ventilate prespiration, and after a few uses, water just soaks through on the outside.
What I've learned is that you simply cannot find gear flexible enough to keep you dry, anything that is breathable enough to get rid of prespiration during heavy exursion won't keep the rain out, and anything that truly keeps the rain out, gets soaked on the inside with prespiration.
The key is, staying warm while wet. What I find works well is layering, polypro long johns, a layer of fleece, and real waterproof raingear on top. Polypro and fleece will keep you warm while wet, as they wick away the prespiration. I also use a milsurp poncho, with ankle fit hip waders, it'll keep me dry from the hardest blowing rain, or the sloppiest wettest waste high grasses. Also good for getting in and out of boats, and sloshing through swamps.
The other thing to consider about Alaska is not only does it get wet at times
but the whether changes extremely fast. You can see clear skies and 60 degrees one day, and have blowing sleet and snow the next day. It is really tough to carry enough gear to be prepared for all situations.