'What's good food or simple food to bring bushcrafting or camping' gets asked on our bushcraft courses. To that I would say:
1. Tinned Soup
2. Tinned Baked Beans
3. Pasta & Tomato Sauce
4. Sausages
5. Fish
6. A Lump Of Meat
7. Bread & Cheese & Salami
8. Nuts & Dried Fruit
9. Regular Fruit
You are looking for nutritious/high energy/good quality food. Anything
with salt, such as peanuts, is good for your hydration (drink plenty
water also). Anything with fluid, such soup/pasta sauce, is also good
for your hydration. Food in tins can often be heated directly in the
tin. Avoid quick-fix stuff. Pre-cooked packet meals can be fine (like
wayfarer meals), but ultimately much better to be cooking basically and
properly yourself. Leave the packet meals at home!
The physiological benefit of a hot cooked and hydrating meal at least twice a day (breakfast and dinner) is huge.