@Monte – IMHO, flatpacking it works better than the pen thing. I have about 20′ of inch gaffer’s tape in my camera bag wrapped around a 5″ piece of heavy cardstock. Takes up so little room I actually had to put it someplace conspicuous because I kept thinking I’d forgotten it and it wasn’t readily apparent in a cursory tossing of the bag. Keep meaning to do it with some Gorilla tape for the car bag.
Triox tabs (or hand sanitizer) for starting damp wood might come in handy… But I’m widely considered a little odd. I have a canteen cup and stove, and instant coffee in mine. I can handle the zombie apocalypse, but not before a cuppa Joe.