Many actors appear on the show because it gives them a chance to visit the Caribbean (series 3 guest star Tristan Gemmill described it as "winning the lottery for actors").
Joe Absolom said that he actually ended up going broke while shooting an episode because he brought along his family to enjoy a tropical get away. He says he doesn't mind because he had a great time.
Averted by Ben Miller who (despite enjoying working on the show) suffered because Poole wore wool suits despite the heat and humidity (Poole was often shot from the waist up because Miller would wear shorts and sandals to try and deal with the heat). He departed the show because he wanted to be with his family but his wife couldn't stand the tropical climate.