The scene with the Indian warden is a reference to the famous scene from the book, The Catcher in the Rye. Other such references to this scene can be seen in shows like Once Upon a Time (2011).
Klaus mentions that they can make "Spätzel" by the fire. There is no such thing in German, although there are "Spätzle" (a cute version of Spatz/sparrow), but those are egg noodles and nobody makes them for camping.