Denise, It sounds like you have a fun plan in the works. Alaska is a great cruise, so much scenery. If you are interested in seeing whales, I suggest booking a tour from Juneau. I recommend Harv & Marv tour company, however they are a small company & may already be booked up. There are others that will be fine as well. As someone else suggested the White Pass Rail trip from Skagway is a worthwhile excursion & will get you into the countryside.
We have been on 3 Alaska cruises with HAL. I'll be following your "live from".