I a Seattlite and a kayaker. I've looked at the charts for the Inside Passage many times, wanting to make that trip. The overland/water combination is a great idea. There is so much wild country on the way--- all the inlets and bays, streams and rivers and the wildlife.
There is nothing like paddling along and having eagles soar overhead, or floating down the mouth of a river into a bay with the tide and having a seal poke it's head out of the water a few feet away, floating along with you. Then there are the Orcas, the Gray whales, Great Blue herons, puffins, otters, sea lions--- it's awesome, in the true meaning of the word. I wanna go too!