We booked a one-week foray to Cuba in search of palm trees, turquoise waters, great music and an endless stream of piña coladas. This was to be a family holiday, and I’m sure I am not the only photographer who has discovered they cannot diligently shoot while on vacation. As a compromise between my own impulses as a photographer and my respect for the notion that this would be a family holiday, I decided to take just one small carry-on …