I pack enough supplies for at least three days of camping outdoors, should it become necessary. Essential items I carry are those that meet the basics of survival like shelter, water, food, security, etc. For shelter I use a tent, sleeping bag, and sleeping pad. For water, a hydration bladder, bottled water, and a Nalgene bottle with water filter. For security a handgun, along with a machete, knife, and tactical flashlight. For food, a 3600 calorie emergency ration bar, instant oatmeal, granola bars and various snacks. The list goes on but the pattern remains the same, identify a need and pack accordingly.