I totally agree that beer must stay cold, but for the main meal, a warm, re-constituted freeze dried meal is hard to beat out in the wilderness. A small butane or white gas stove provides the heat, and your canteen provides the water, and ten minutes of time to a hot meal.
If the packaging is not compromised, freeze dried foods will handle any environment a human can endure.
For disclosure: I used to work for a freeze drying company.
tom
