Be aware that if someone stumbles on it they could ransack it or vandalize it. IIRC, it happened to a FReeper not too long ago. I wish I could recall who it was.....
But if you're going to store stuff on site, you need to camouflage it well. Find somewhere on the property not inside the house to bury stuff in hermetically sealed containers.
That is what I was thinking, but I don’t know how deep it has to be etc.... do I need to line it with rocks, cover it with rocks...etc to prevent bears and other animals from digging it up and ruining it.