Welcome to Cruise Mates. I have not done the itinerary you are looking at but it looks pretty interesting.
I know there are a lot of places to post here, I might suggest you repost under the Princess forum and maybe under the Cruise Line Suggestions and Destinations areas.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Alaska 2014 - haven't picked a cruise yet
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, Caribbean 2013