Ok so everyone put down their sharp objects. I will be the devils advocate in this discussion. Don't hate me. I would say that I would go on the cruise. Here is why. Because this is such a special cruise and very tough to get on I would think that your family would understand a prior commitment as special as this. I am not saying family is not special because they are but in my opinion it is a little selfish (I am assuming here) to make plans without asking everyone involved if there was something going on that weekend. From what you have said your parents and some siblings made the plans. I have told all my family because my Dw and I are so excited we have been driving everyone crazy with our plans. I just find it odd that they did not take into account your plans. I guess you have to ask yourself if you will be able to go on the cruise and enjoy yourself or feel guilty but the opposite is true as well will you be able to go to the gathering and not hold a grudge against them for changing your plans.

Whew so far no daggers in my back!
Hey thanks to everyone for the B-day wishes. Funny I had to go back to work to get free time to get on the board. Crazy schedules at home with baseball and yardwork and confirmation.......
Have a great week!
Scott