Instructables has had a few relevant projects lately. If you don't already know, Instructables is a site for sharing instructions on how to make stuff - food, sewing projects, electronics, all kinds of stuff. I'll have to go back through the archives and see if there are more that have relevance. I think I saw a solar water heater project at one point...
The Rain or Shine Solar Charger is potentially quite useful. It's basically a solar panel in a clear pouch for backpackers. It's mildly weatherproof and lightweight. He also shows how to hook it to a phone charger. This is a really good one with detailed instructions and decent grammar.
Here's another one, the Pallet Shelter for "Urban Survival". Basically just simple pallet walls held together with bungee and velcro straps, covered with a tarp. This is the kind of thing you just need to see once and then it sits in the back of your head until you need it.
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