Can't beat home-made flapjacks (from the Winnie-the-Pooh cookbook...), and fruit 'biltong', with hazelnuts, raisins, chocolate drops, dried apple and banana bits, sunflower and pumpkin seeds and freeze-dried blueberries. Pumpkin (or watermelon seeds) are great, 'cos in the warmer parts of the world, you can plant them in each camp you make, and next year you might be pleasantly surprised...