I hear you can generally get sea sickness meds for free on board. See what SPF she's using now. I don't tan, I burn, and I took 4 spray cans of 85 SPF last year for a week! Oh, and I would trust my fiance to pack for something like this (but don't tell him that, he'll try to make me fit everything into one bag for the next one!)...more than my mom, strangely enough! If you do forget something, it's just an excuse to go shopping.