Something else to keep in mind is calories. Do you want to make sure you’re getting a good carb fat and protein ratio. Carbs and proteins are 4 cal per gram and fats are 9 cal per gram. Survival situation calorie dense foods will really help. Carbs are great source of energy protein helps keep your muscles going and fats are very calorie dense. You need a solid balance of all three. Avocado oil, olive oil are great substitutes for fats. Rice and pasta are great for carbs. Just Have to figure out your long-term proteins source