I'm a big fan of taking a hunk of Parmesan cheese; it keeps forever (or at least until I eat it), it's a versatile way to make a lot of food taste better, and it's a pretty good snack on it's own (don't judge me).
I'm fond enough of alcohol stoves that I've been known to bring them along as a secondary burner, just so I can make myself some tea while dinner is cooking. I've gotten a few amused reactions from that, and disbelief that a cat food can could serve as a stove.