Alliegirl, Welcome! I don't know the timeline for Hawaiian cruise ports but if you are there for an early am ride to the summit of Haleakala on Maui, it's so worth it, especially if you have clear weather for the spectular sunrise. If you do this, bring some warm cloths as it is very cool prior to sunrise and the trip back down. The landscape reminds one of another planet. On Oahu, again, depending on time available, a ride to the other side of the island for a tour of the Polenesian Cultural Village (can spend 1/2 day there easily) is well worth it. The visit to Pearl Harbor and the memorials will bring a tear to your eye and be one of your highlights. Enjoy..