Welcome aboard, Tamela! You must really be looking forward to your sailing onboard the Disney Wonder next spring! My family really enjoys everything from the Broadway-style shows to family activities that Disney offers on the Wonder, so I'm sure your family will have one very magical cruise!
The five night sailings include four cruise casual nights (one of them will be
Pirate Night!) and one Dress Up night. The longer cruises include a Semi-Formal and a Formal Night, but the five night sailings have simply the Dress Up night, so you can feel free to be formal or semi-formal that night. You'll see a bit of everything that night, so as long as you wear the dressiest outfit you bring in your suitcase on that night, you'll be all set. Even the Disney characters get into the act on that Dress Up night. Mickey and Minnie will be wearing their formal best, so don't forget your cameras as this certainly makes for some great photo opportunities!
Please stop back and let me know if you have any other questions throughout the next few months as you continue to plan for your cruise, Tamela! I'm happy to help!