To get a difinitive answer ask your travel agent. I do know that the pools are freshwater. I belive that if the ships have MUTS then the pools are closed at night while the movies are playing otherwise the pools and hot tubs are always open except for a few hours in the wee mornings for cleaning. This was the case on the Golden.
We found the entertainment on Princess to be very good, especially in the smaller bars, and show lounges. The production shows in the Princess Theatre were ok. We like the musical reviews better than the big production shows, good comedians. The disco doesn't get hopping until after 11pm.
Don't miss the deck party its a blast