Cruise Help Needed!!!

Next weekend DH and I leave for a cruise on RCCL's Adventure of the Seas. I am having the hardest time figuring out what to pack for the dinners!!!

I have my two formal night dresses, which I typically wear to NY weddings.

I think I have my two 'smart casual night' outfits: a black and white striped Ann Taylor Loft skirt and a nice black sleeveless shirt with a little white sweater to go over it AND silky looking black dress capris and a floral sleeveless shirt, both with black slides with a small heel.

I have no clue what to wear on the 'casual' nights! I know I can't wear shorts or jeans (even if they are 'dressier' rather than just for kicking around in). What do most people wear? I've heard people say 'sundress' but how casual of a sundress (there seems to be such a range!)? I'm not sure where the line is between the smart casual and the casual on a cruise! HELP!

I wore capris or a skirt with a nice top or sweater set(because I am always FREEZING on cruise ships). Just try not to bring to many clothes because u won't wear them all. Save everything that is loose for the end of the week because u will need the extra room.
Good Luck and u can FM me if u have any more questions.