I use wood. I have this grill...
http://woodflame.com/en/delecto.php
http://www.snappdragon.com/woodflame-grill-delecto-p-9.html

for my all my grilling, but it is perfect for disasters. It was pricy, but it's the only grill I've ever had, it has lasted for years, and I never pay for fuel or have any concern about storage of fuels, obviously. It gets super hot, sears food and keeps in the moisture.

It uses chunks of hardwood, and has a fan that adds air to the fire box and makes the wood burn very efficiently, powered by either battery or AC adapter. I gather the wood from my backyard (full of hickory & oak trees), saw and hatchet to size. One set of D batteries is enough for a several months of cooking. One handful of wood is enough to cook a meal for 4.

I have taken it camping and on vacation. It's coming with me if I ever have to bug out. I have even used a fresnel lens and dried grass to start the fire in the combustion chamber!

Feel free to PM me with any questions.