What important lesson does Woody learn at the Yeller's Modern Tourist Camp in the novel, West With Giraffes?

Yeller's Modern Tourist Camp is the setting where Percival Bowles tempts Woody to abandon his closest friends, a mistake he struggles to forgive himself for. Although the place seems a safe refuge, hiding under its facade is a more sinister reality. After bribing Woody with money, Percival returns to steal the giraffes, and in the process he further injures Wild Girl's wounded leg. Woody's encounter at the tourist camp teaches him about the evil lurking in humanity and gives him a glimpse of his baser instincts.