Share 'Solar cookers and Rocket stoves'

When camping in my Westy I plan to use my propane cooker as backup, I converted it to use 1lb canisters so I will use propane less.  So how to cook my food for free?First I found out about Solar Cookers which you can make your own for cheap and it captures the rays of the sun to cook the food.  Temps get up to about 300 degrees.  More like a slow cooker.  Yahoo! has a solar cooker group where oth…