Let's assume the following.
>The island is quite large
>Inhabited by savages. I'd prefer them to be somewhat aggressive, so we could conquer them with rightful Casus Belli
>Subtropical climate - it's not meant to be hellish, right?
>Crew is large enough to do conquest, 300 or so
>We are all somewhat to very religious men
If the locals farm, we maintain that. If they fish, we maintain that. If they don't, we attempt to broaden the ecosystem. Weekly routines will be enforced with religion - Christianity. The Captain (me) will be crowned king. We will start schools, marry the local women - monogamy preferred initially, later enforced. We will study their culture, and develop it to where it belongs.