For a nice alternative to Lord of the Flies check out the true story of the Tonga Castaways, 6 Tongan schoolboys who were marooned alone on a deserted island for 15 months until rescued, by chance.
https://en.wikipedia.org/wiki/Tongan_castaways
I think their story more closely resembles what would have happened to the Wild Boars. They survived, cooperated, coped and managed to thrive until found. They had long been given up for dead and their chance rescue was celebrated as a miracle in Tonga. Australians may be familiar with the story--it was widely reported and written about. In the US I never heard of it until I read the obituary of the man who found them a couple years ago. If it makes it more interesting, they were all naked when found, though, alas, there aren't any photos. (And, at the risk of sounding creepy, they weren't as cute as the Wild Boars).