You might have better luck finding others going on this cruise if you look at the roll call boards on CruiseCritic.com <direct link removed
It is a great cruise and there are lots of choices from sightseeing, to renting a car, walking around town, taking a helicoptor. Explore what tours Princess is offering, decide what appeals to you and then decide if you want to book one of their tours or do your own thing.
Have a wonderful cruise.
Edited to remove direct link. -LP