The 25,000 acre parcel in the book is on Kauai ... and that's the case for the location in the movie. The land is a 900 acre ranch not far from Nawiliwili harbor (but cut off by the mountains) called "Kipu Kai." It's only accessible by four wheel drive, zodiac boat (or helicopter). The ranch is owned by the Waterhouse family (an old kamaaina family) and their story is similar to the Kings. The family acquired the land in the late 1800s from Princess Ruth. I was privileged to visit Kipu Kai when working on a project with Alex Waterhouse.