Another option is to use MRE heaters. These work well where I'm at (SW Pa) 9 months out of the year (forget Dec-Feb) as they don't heat up enough in the cold months. We used these in Scouting to do stove-less cooking in prep for areas where we weren't allowed any open flames. They are not cheap (around $2 ea) but they do widen the range of foods you can take, and stave off cold meals.

They do require some pre-planning since they basically are reheating foods, not actually cooking, but if you combine them with the wide variety of pouch meals (not dried pouches), and meals you can pre-cook on your own, it's not a bad alternative.

MRE Heaters
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