I think Catherine has pretty much covered the main points and observations of the trip.
I too, found the holiday to be very enjoyable and the Kimberley region is certainly an area of outstanding natural beauty.
Just a few further minor suggestions from me;
All in all though it was a professionally run, excellent and fun trip. The guest lecturers on the Coral Discoverer were first rate and very knowledgeable.
Thanks for your assistance with the holiday.