Learn from your mistakes
these are not my mistakes, but could very easily be
Old cars if allowed hold treated gasoline (gas gets old)
Old vans with inflatable water tanks inside
Garden supplies include seeds and fertilizer
Wind generators that are laying down on the ground ready to be raised up in an emergency (they make noise)
Male and female animals
Chicken coop
Make sure your septic tank is cleaned every year
Heck with solar panel for power
Get solar panels that circulate water for hot water