Hi Kim, welcome to Cruise-Chat. For packing I'd suggest taking a couple of pairs of dress pants with different tops. For the men, polo shirts or a nice Hawaiian shirt on casual nights will do fine. Formal nights aren't like they used to be. I really miss that, but I guess it's the way it's going to be. Take a pair of shoes that can match everything. For example, I take a pair of black dress shoes, a pair of water shoes, and a pair of tennis shoes.
Be sure to try the chocolate melting cake, it is so yummy! Best wishes for a fantastic cruise and once again, welcome aboard!