Thanks for the tip! When we went on the land/sea in April, my kids had just gotten over the cold and I had gotten the sinus part. We tried for days before we left and then the whole time we were at Disney World. The plane trip was murder. Well the day we left for the cruise, I was in a panic. They handed out all the papers and told us if we had flu symptoms, that we could not go. Well I was going thru boxes of tissues an hour and was on a bus with all these people, I was afraid they were going to make me get off. Sars was happening at this time too! Well they let me on no problem and the next day I was in so much sinus pain. I went to the medic on board, terrified I would be put in quarantine. She said no problem, could tell it was a sinus infection, gave me medicine and I was on my way in a couple of minutes.
So if you are still sniffling, you should be ok.