I love the idea of a last minute adventure, but... I've been on a bunch of cruises, and the papers you fill out always require the exact names and IDs of the people going. It looks like a lot of people on here want someone fill in, or substitute at the last minute. I know there would be no problem if you found a partner at the last minute, and then booked together, but I'm thinking it could be a big problem, if you tried to switch someone's name. Are the cruise companies helpful when you try that? I'm skeptical that you can place an ad here, and get a person to fill in when you've already booked.