I've not done whale watching in Dominica. There government site is very good http://dominica.dm
They recommend Dominica Water Sports: Whale Watching in Dominica
Watch your available shore excursions, something may pop up there.
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