I think the answer to the question is largely dependent on where you are living/plan to live: Tropical or Temperate Rainforest, Boreal Forest, Desert, Savannah, etc., whether on mountain or lowland, and also the presence or otherwise of predators such as bear or lion, and other such problematic critters such as snakes, ants, scorpions and other pesky members of the insect world. What you need for shelter needs to keep you warm, dry and safe in your "theatre" and the same applies to your food: it needs to be safe from theft by two-/four-/six-/eight-/multi-legged creatures and spoilage from excess heat or cold or moisture. You also need to consider water collection/capture/purification/storage. Also fuel for heating/cooking. And what to do with ALL your waste products. Consider also tools, first aid kit/medicines. If you're not going completely back to nature you may consider a windgen and/or solar panels for electricity or recharging your MP3 player. And are you commuting each day from your camp to your job in telesales/truck driver/police officer/nurse (i.e. do you need to iron a clean shirt each day?) or have you gone bush? How are you going to get mail/pay bills/read BCUK?
I think a more specific question may elicit more helpful or useful responses?