We will be on the Fantasy in 2 months (yay us! )...while on board, I will be booking 3 cabins for the Dream in 2013. One of them will be for the family of my DS best friend. He wants a graduation cruise next year as his gift. What info do I need to have with me on the Fantasy to book that cabin? I've never booked for a non family member before, so unsure how to do this. Thanks for all the help!