If you can, park a green truck in a dense forest, store everything there. If you don't have access to vehicles, you can "add on" to existing structures to store your goodies. Try placing barbed wire/sandbags in between the gaps and cracks of a factory concrete building. These things make for GREAT camps. A lot of room for tents, fires, cars and anything you can think of. But only do this if to Factory building has a pre-existing wall around it, or you'll run out of barricades fast. Also - make sure you leave a secret place to enter/exit, like a crack in the wall, a slight gap in between barbed wire to vault over, just be creative, and happy hoarding :]