Are you flexible with your dates? I'm thinking about doing the 18 day Hawaii round trip from San Diego with Holland America Dec 3. It's about $300 dollars more inside (about the same price outside) with an additional stop in Kona and an overnight in Honolulu. I also prefer leaving from (and returning to) SD since the airport, train station and cruise terminals are all within walking distance of one another in downtown.
I'm also interested in a San Diego to Hawaii cruise (I also like taking the train to the cruise terminal in SD). I'm interested in Celebrity Century on Nov 6th (currently $830 inside), but could do HAL or Celebrity, and probably could go in December.
I also sent you a "private message."