Aloha,
I found a great site to build a simple,cheap solar cooker that would be ideal for a teardrop trip....or during the next hurricane ...it can also pasteurize(purify) drinking water or boil it
I will definitely make one before the meat spoils during the next hurricane
The Solar Funnel Cooker
http://solarcooking.org/funnel.htm
and at night the same funnel can cool...it can freeze water when temps are 50 degrees or so....interesting site