I'm going to go with this option. It causes the least disruption to those already booked and a 5 day interval should suit the flow of people in and out rather than having 2 cruises over a 3 day period and then none for a week. I appreciate this might not be ideal for some, being their last full day but I think overall it is the best option, bearing in mind the 15th and 16th are out. The booking pages have been changed and the 18th is now available for reservations.