Wow, let this be a lesson in how not to organise a cruise.
Mike: In future if you want to organise a cruise, make a decision on where you would like to go and when so that you can provide specific details to anyone who is interested, then post a thread. If people dont like your suggested cruise venue/time/date then thats their problem.
Make sure your thread includes all relevant information on the planned destination, meeting time, meeting location etc to reduce the questions and keep things tidy.
This might make things easier for you next time
Nick