....this might work well. VERY lightweight so it's easy to pack. Not 100% sure that it's wide enough for all the characters to sign. Debating whether I'm keeping the one I found - neither DH and DD think it's something they would want as a 'memento'. (DH thinks it should be more direcly Disney related, not 'cruise' related - but he's very literal like that. At all times. But that's a different post on a different thread .)
http://www.target.com/p/anchor-with-rope-natural/-/A-16625171#prodSlot=medium_1_3&term=anchor
http://www.target.com/p/anchor-with-rope-natural/-/A-16625171#prodSlot=medium_1_3&term=anchor