Congratulations on the 30th Anniversary; how wonderful that you will be spending it with your sons. It's not easy getting three adult children together for a cruise: I know--we've been trying for years!
I haven't been to any of your ports, so I can't help there. But whether you decide on Princess Excursions or go independently, you should try to book well before you go. The more popular Princess excursions fill up fast so if you go that route you should reserve space as soon as the bookings open--usually 120 days prior to your cruise.
The Crown Grill is also very popular; I would make your reservation as soon as you board to be sure you get the day and time you want. Are you doing that ON your Anniversary?
Not too many questions at all--we LOVE questions.