If the Howells were so rich, what were they doing on board the lowly Minnow?
Mary Ann and the Howell's had full wardrobes too (including an 18th century ball gown!).
If the island was uncharted, how come so many people were able to find it (but whenever they sent out a search party, the US armed forces weren't able to when in fact they've used the island during WW2?)
There was the rich socialite Erica Tiffany Smith, the actor who tried out his "Tonga" act on the castaways in order to prepare himself for the role in a Tonga movie (and how come Tonga knew that there were going to be people on the island to try his act out on?), Kincaid the great white hunter, the Ginger look alike Eva Grubb, the Gilligan look alike Russian spy, The "ghost" who haunted the island but was really another foreign spy, Dr. Balinkoff, the rock group The Mosquitoes, Wrong Way Feldman, Lord Beasley, Wiley the kidnapper, the South American dictator who was put into exile on the island, and a countless number of natives from the other surrounding islands.
Never mind the people who found the island by accident:
The Mr. Howell impersonator, Harold Hecuba the Hollywood producer, a Japanese soldier who thought the war was still on, the two russian astronauts, even a robot.
Dude, you spent way too much time watching television in your youth.