i forgot to ask what type of activties do you like/want to do? how willing are you to wander on your own? those will affect some of the recomendations.
the best part of travel to ak. is that it is almost possible to go really wrong. if you see the big famous places it will be a great trip. for all the competing advice it comes down to there are many, many great places to see and this is a beautiful place. it has to be for us to put up with the dumb weather.