Welcome aboard, Cristina! One thing I can promise you as you set sail with Disney Cruise Line, is that you won't lack for photo opportunities with the characters onboard!
The first time you will see Mickey or Minnie might even be in the port terminal as you wait to walk onto the ship. Sometimes one of them is known to show up for a photo meet and greet!
Once you set sail, each day you'll receive a Personal Navigator that lists that day's events, activities and character greeting schedules. Mickey and Minnie, as well as many other Disney characters, meet with guests multiple times each day.
On the dress-up nights, the characters will even be wearing their formal attire! The first and last days of the cruise, you'll most likely see them in their cruise/sailor attire, which makes for great photos as well. And of course, on
Pirate Night, each of the characters will be available for meet and greets as they show off their pirate costumes!
So, take a look at those Navigators onboard and surely you'll find multiple times that will work for your family to get some great photos! Have fun planning, Cristina!