The title and some of the plot come right out of The Banana Splits Adventure Hour (1968), which ran a live action segment called "Danger Island" with a shipwrecked group of people trying to survive evading pirates, cannibals and all sorts of zany characters.
In Lana's first scene, she and Ray have a conversation in French which translates to: "Your highness." "Why are you speaking to me in French?" "Because the official language of Mitimotu is French."
Much of the set up, including the choice of plane and some of the characters, owe a lot to Tales of the Gold Monkey (1982).
Archer's airplane is a Grumman G-21 Goose.