Most nights for dinner I wore capri pants or a skort with low heel sandles. You see EVERYTHING. We did dress for the formal night in a cocktail dress and heels. I think a jean skirt would be fine. Just be comfortable and remember that you are on a moving ship so we appropriate shoes. Before our first cruise, I stressed over what to wear but once there I quickly realized that its more important to be comfortable and enjoy myself.
Have a great cruise.
C Owen, SC