Grills from old ovens can be used for fire grills, refrigerator shelves cannot be used as they will release toxic gasses when heated. A frisbee will add support to paper plates when the plate is place inside the frisbee. Make a camp washing machine from a five gallon bucket and a toilet plunger. Placing a plastic garbage bag over logs in a triangle will create a wash basin. Making a slit in a trash bag large enough to let your head through will make an emergency poncho.
Laundry lint makes good tinder.
Cutting slivers off scrap lumber and heating in the oven to dry out the wood will produce some very dry tinder. Remember to store in plastic bags for your next trip. Save candle stubs for fire starters or to use as paraffin to make other fire starters. Cover the ice in a picnic cooler with foil to help it last longer. Keep the water in your canteen cooler by wrapping the canteen in foil.