If any of you are familiar with Chico's, they carry a travelers line that is wrinkle-proof. Get the long black sleeveless dress and dress it us with one of their jackets. You will look very appropriate. Or get a pair of their black travelers pants and match it with a black beaded top for formal night.
I you don't have a Chico's in your area, go to www.chicos.com
Hope this helps!
YaYa Cruise Goddess