The production was granted permission to shoot on the USN aircraft carrier the USS Kitty Hawk. As such, because of this, studio head Walt Disney scheduled the film's world premiere on the ship with its crew being the only invited guests.
The character name of Robin Crusoe was a spoof of Robinson Crusoe whereas the character name of Wednesday (or Girl Wednesday) was a parody of Friday (or Man Friday) - both from Daniel Defoe's classic novel "Robinson Crusoe" which the movie is a send-up of.
One of the final productions that studio head Walt Disney personally oversaw prior to his passing away in December 1966 - the year of the film's release. Like a lot of his studio films of the period Disney was an uncredited producer on the picture.
The real-life tropical island that portrayed the South Pacific isle that Lieutenant Robin Crusoe (Dick Van Dyke) was castaway on was actually the island of Kauai in Hawaii. The majority of the picture was shot on location on Kaua'i.