Last summer I drove from San Diego to Seattle then took the Holland America cruise to Alaska. First cruise ever for me and it was fantastic. Got to see a little of each place we stopped but did not do any of the organized tours.
It was fairly cheap, the weather was great (last week of June), the food was good, the room was nice. An all around good time. As I recall it cost about $1800 for the week for two people including tax, tip, drinks, the works; everything except getting to Seattle.
I have traveled everywhere, all over the US, by plane and car and it sure was nice to unpack once and wake up in a new city every morning. Next time to AK I would probably fly in and stay in one place for a while.