Hi
There were 8 of us on our Silhouette cruise in April,(4 cabins),we did link the bookings on line before the cruise,,,,,dont expect to turn up and be seated straight away you will maybe get a bleeper to tell you when a tables ready.
We sent one person early (18:15) to give them notice we wanted a table for 8,,,,sometimes they made a table up for 19:00 a couple of times it was nearer 21:00.