By dumping photos, do you mean taking them off your camera's memory card? There are several choices: You can buy more memory cards, you can have the ship's photographer burn a CD for you for a fee and then erase your card or you can bring a laptop to transfer to or a storage device.
The easy way to to bring as many memory cards (Secure Digital or Compact Flash or if you have Sony they are Memory Stick) as you need.
