Have you read his later book about their explorations on Easter Island, Aku-Aku? The stories about their crawling into the family caves absolutely made my hair stand on end (I HATE low dark places.)
Read it too.
There's another book, name slips my mind, about how he and his wife pulled a pre-hippy stunt and went to live on a Polynesian island to get "back to nature." This was back before the war.
They found out it was a lot more fun in theory than in reality.