In reply to brockley_buzz:
A few tips I've picked up over decades of wild camping:-
Keep the weight of food down by removing needless packaging and repacking using sandwich bags and cling film, ideally packed in individual meal sizes. Pasta is great for wild camping; provides carbohydrates and is compact and is bulked up by adding water. Take a couple of tubes of paste like tomato puree to give it flavour.
Space in a lightweight tent is likely to be at a premium so carry a tough dustbin liner and you can put things, like boots etc, you won't need overnight in it and keep it just outside the tent door flap.
Take a few peddle bin liners for carrying out rubbish, and or burn flammable stuff - but obviously with extreme care to avoid any risk of setting fire to surrounding.vegetation
Tufts of grass mixed with a bit of water make ideal scourers for cleaning a cooking pan, particularly if you burn food in it.
A good night's rest is worth a lot, so get a good sleeping bag and insulating mat. The advantage of closed cell foam over something like a thermarest is that it won't puncture, but if you want to use the latter don't forget to carry a small puncture repair kit.
Keep your sleeping bag dry! Pack it in a dry bag or similar. If everything else gets wet, at least you will sleep dry. I prefer to use a down for compactness, lightness and warmth - so keeping it dry is very important.
Choosing a camp pitch is important. As others have said find as level a site as you can and pitch the tent so that your head is uphill. Beware of hollows which could fill with water if it rains, and when camping close to a stream look at the surrounding lay of the land to establish where it could rise and flood in a downpour.
Dig a hole a defecate (carry a trowel) and don't do it, or urinate near a stream. burn toilet paper in the hole before filling it in.
Spare head torch bulb and batteries. I also carry a tiny repair kit of needles and thread which has proved invaluable more than once when I've torn clothing, lost buttons etc. it fits in my small first aid kit. Tweezers in the first aid kit have also proved invaluable. I once tripped and fell into dense and very prickly Maquis in Corsica. Without tweezers I would have had to abandon the trip as with the help of my climbing partner we had to extract about 100 thorns from my palms, legs and back.
Depending on where there is water available you may want to consider carry water sterilisation tablets.
