We had a wonderful day trip with the Kimberley Day Cruise, in fact it was one of the highlights of our 6 month journey around Australia. We were very lucky find availability at short notice so I would recommend booking in advance. Also recommend joining the day trip at Cygnet Bay rather than Broome, there are accommodation options at Cygnet Bay, including powered and unpowered camping. This option also allows you to do the complimentary Pearl Farm Discovery Tour at your leisure.
The day itself was spectacular, water calm, the all day catering was an unexpected treat, and the crew pampered us with attention to little details as well as providing an insightful cultural, historical and geographic context for the day. Highly recommended first class experience.