Be prepared for small children. Do not kill them. Do not shove them over the rail. I know school just started and they should all be there, but they won't be. They will be everywhere you want to be, at all times, screaming.

Exception: the 18+ area at the top of the ship, which BTW was clothing optional on the boat I was on. *shudder*

Everyone will want to take your picture. There will be picture stations set up all over before dinner so you can get Glamor Shots, and there will be a guy with a camera every time you get off the boat. They will then try to sell them back to you for a trillion dollars.

I didn't do the Captain's dinners, so I can't help there. I wouldn't bother to bring my own snorkel. All the ones I saw had like disposable plastic wrap on them so you weren't actually licking other people's mouth germs.

Buy the mint green dress!