Harry Potter And The Lost Island

What if instead of landing on the hut in the middle of the ocean when the Dursleys tried to hide Harry, they ended up on a 'Deserted' Island where they all have to be active in order to stay alive. Read as Harry and the Dursleys fight for their lives against the mysterious forces of the island which still ironically hides Harry. Slash! Harry/Creature/Harem! Mpreg. Changed/Dursleys!