I am looking for a children’s picture book from the 80’s.

Synopsis: Two island children were told by their elders not to ever visit a certain island near them as there was danger there, so naturally, the two adventurers decided to go anyway. They were frightened off by somebody wearing a scary mask and they scampered back to their canoe and back to the safety of their own island.

Pictures: It was pretty much a picture book with vivid illustrations on every page, with a little writing in big bold print. Lots of palm trees and jungly illustrations.