aluminum nails.
-Ligther
-More enviro. safe
I`d also reccomend the thinner nails (steel) but smaller and can still hold things together.
As far as more cord you cuold always add some paracord to your knives(s) and or ligther to get an extra couple feet.
This smaller, nice, shelter 'contest' just popped into my head lol... Time to see what I can come up wtih <img src="/images/graemlins/smile.gif" alt="" />