[reformedliberal]

Johnny:

Have you ever done thermos cooking or used a haybox or Wonder Box (http://community.tasteofhome.com/community_forums/f/25/t/730768.aspx or any other device to hold the heat in for a long time w/o added fuel?

These are on my list of things to try. Doubt you could cook for 300 this way, but probably for 8-10.

[JRandomFreeper]

I've cooked on a car engine on road trips, and kept stuff hot in a compost pile, but never done the thermos cooking.

I do regularly use a gigantic Igloo cooler that is big enough for commercial half pans to move stuff for catering events. Generally it finishes cooking in the Igloos, and stays plenty warm.

/johnny