Hey I think you will have a wonderful time and you will love the Princess mini suites - they are really nice and about equal to RSSC standard suites in size. Pacific Princess is one of the old R class ships from Renassaiance (sp?) so its about the same size as the Oceania ships, although they have refitted it to carry a few more passengers, but not many.
Have a great time - Princess does a really good job overall.