"Crib" is a very common word in the Australian mining industry - courtesy of our Cornish forbears.....
Whist the Zilders' use of the word for a holiday house and the mining version no doubt have the same roots, I've often wondered whether the "crib (ie lunch) room" on a mine site (either underground or on the surface) derives from the old time miners' passion for cribbage, the card game?
The term is used in several contexts on a site. For instance, one's lunch is also referred to as one's crib - to be consumed at crib time.
By the by, I made a happy link to the past when I found a home made cribbage board at Kanowna, 19km NE of Kalgoorlie in 1987. It had been carved from the side of a dynamite box sometime between 1902 and 1920 (worked this out by knowing when the mine whose dump I found it in had been operating).
stales
