I've burned some nylon duffels the fire was disgusting, stinky, smoky and nasty. but they burn...

If I hear a helicopter after pressing the plb and my leg's busted, trust me. my trusty old GG virga pack is going to give it's life for me (possibly with my dirty underwear), along with any handy bits of tundra and other stuff on top - a little bit of fuel and my fire starter candle for accelerant and look out.