[@Dextkiller] it's more of a situational thing, and the plot will be character driven. I'll throw things in to shake stuff up, but otherwise everything happening will be from the imagination of the players. 

[@Roosan] the interaction all depends on the players. At first the ship survivors have no idea where they are or that there a people on the island. The docked on the uninhabited north side of the island. The natives oracle has foretold there coming so the natives are watching from the distance. Native believe that the survivors and ship are sent from the gods. Anyway it's character driven so we shall see. Since it all depends on everyone's characters personalities and choices.