So my 25th birthday is coming up in Oct and I want to have my party on a Cruise to the Caribbeans... Or in the Caribbeans ... I've never planned anything like this before and i kind of have no idea how to... I know i may want to use a travel agent. I'm not too sure how to go about the invite process... Through the mail? On face book (pretty much all of my bff's are on face book) and/or email... As far as i know i'd like to invite all the people who have meant to most to me in my life to have the most fun of our lives... Which may once i add them up may equal about 50 ppl or so...Do cruise lines have monthly payment plans?? How much would i have to spend to have a unforgettable trip? How long should the cruise be? Any advise would be truly appreciated. If i have forgot to ask something i may need to know please don't be shy