I've been thinking about this since the quake. I'm glad you're doing something more than thinking... Obviously this doesn't have to be UL hiking gear. Do you think blue picnic tarps are the best bang for the buck? If so there's not much to do to make a whole kit - cheap fabric into a knotted hammock, some tie outs from the tarp gusset, and an organza bugnet would do the trick, right? What I'm wondering about is suspension. Once again, it wouldn't need to be too lightweight. What would they hang the suspension from? The lack of trees and solid structures might be a problem.
What about some kind of huge tarp that could give a roof for 5 or 6 kids in hammocks? Just thinking out loud (in print).
.. truly to enjoy bodily warmth, some small part of you must be cold, for there is no quality in this world that is not what it is merely by contrast. Nothing exists in itself. If you flatter yourself that you are all over comfortable, and have been so a long time, then you cannot be said to be comfortable any more. - Herman Melville