if you have never been to Alaska, is prior to your planned trip taking a guided trip up there.
My wife and I did that twice before we went on our own, and in that way you can learn a bit about the weather, and the dangers that you might encounter, which will get you prepaired for your trip which sounds awesome.
Paddlers here can suggest kayaks if you give a few more specifics, such as weight and height. For instance we do long camping trips, and my wife who is 5'-2" and 112 pounds does perfect in her QCC 10X, where as I would need a shoe horn to get into it. She would be lost in my QCC-700.
Good luck and enjoy the planning.