The Look What We Found chili and chicken tikka mixed with some microwave rice (Aldi's is very good) is a favourite of me and my lad when we go camping followed by custard with fruit or malt loaf or even fig rolls.
Porridge oats with milk powder and fruit pieces for breakfast or Oatso Simple stylee equivalent.
We've also taken some pasts bake from the day before in foil takeaway cases from home and heated them up which was very nice.
Jelly Babies for the feel good factor and a packet of mints normally goes down well too. Fruit is good o take if you can avoid getting it squished in your bags which is exactly why we dont take it