I agree leaving a memory card with anybody is a bad idea. I would encourage you to tell your ship mates to come look at your gallery on Cruise Mates! Or exchange e-mail addresses for more personal pictures.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Alaska 2014 - haven't picked a cruise yet
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, Caribbean 2013