I agree with George 100%! Best thing to do is start collecting and organizing now and see who actually puts down a $500 deposit. Money talks and you will find out how many are actually serious about going. I plan 6-9 months in advance just for 1 boat and there is always a few crew changes during the early planning. To reduce cost the first thing is figure out how many Captains you have and spread them to each boat and assign your crew accordingly. The other most important thing you can do is be firm once you have the dates and Itinerary. I know the Moorings will give a big discount if you have 5 or more boats. Good luck and hope you have a great trip.