May not be able to take heating devices onto airplanes if they have fuel or chemicals.
Get there, get a large tin can (or bring one in your check on, a gallon or so) with vents on the bottom sides and a way to suspend a pan o top. You can burn bits of wood and paper in an updraft burner like that (like a BBQ starter thingee) at quite-high temps, even cook on a spit if you are careful and the fuel doesn't have chemicals.
Make your own sterno with cardboard strips rolled into a shallow can (like a tuna can), put a mix of alcohol and gasoline, or better yet kerosene (very easy on the gas), and light. Would have to experiment on the mixture.
Bring a few wire hangers and a ViceGrips with wire cutter in your check through luggage also to improvise pot hangers, and other hardware.
Personally, I like MRE's (especially the freeze-dried ones if any are left); if you strip them out of a lot of their packaging and keep just a couple spoons, it weighs less and takes up less space. If you buy civilian camping meals, make sure the portions are SUFFICIENT.