Marcie:
Since you will be off the ship for a few days, I would have at least two 1GB cards or a way to download. We used three 1GB and 3 128MB cards on ROAR. Next time, I will probably get a 2GB and take that along with the three 1GB cards we already have. You do need a good battery charger; I don't know about the quality of the charger in that package. Although we don't like extended warrantys, we did get one for our Digital Rebel since it includes annual cleaning.