I'm sure Nadine or Sandy can help more than I, since I've not done that itinerary. I have heard great reviews on the White Pass Railroad, the Whale watching excursion, and the Glacier excursion. There is a lot to see and do in Seattle, too. Fisherman's Wharf is a must there. The Space Needle (if the weather is nice). You have to try the crab there, and there are a ton of good restaurants to try dungeness and Alaska king. Although San Francisco is known for its sourdough bread, Seattle's pretty good too.
I hope Sandy or Nadine will see your post. They've both been on your itinerary.