I like couscous (and rice) for camping because it doesn't have to be drained, like pasta. Doesn't waste water (poured out onto the ground or where ever), don't have to try to pour boiling water through a sieve, plus it tastes good. I wouldn't count on it for more than bulk and carbs, though. If you want protein, try quinoa, which is a South American seed that is a complete protein. (Pronounced keen wah, by the way.)
Quinoa soaks up all the water it's cooked in, too. It's gluten-free, has more nutrients than couscous; see
http://www.nutritiondata.com/facts/cereal-grains-and-pasta/5705/2for the "Nutrition Facts."