See, when I read that I saw a bunch of adjectives, describing the snake in question...
Thusly you'd be eating solid metal snakes'n'gears.
Also, if we were all, as a clan, on a deserted island... I doubt we'd have that much trouble surviving. A lot of things are edible, plant and sea life included. I know way more knots than I ever should, so netting and shelter woldn't be too hard, provided we have enough foliage around. Also, I saw Castaway that one time and Tom Hanks made fire.