You do NOT, first off, let it be known you even have the first 'hoard." - because they WILL clean you out in one hour - and it IS in the Marital Law 'laws' that they CAN swoop down on you, who are now not a 'storer' of foods, to an "illegal hoarder."
It's also wise to know how to forage wild plants in you area and what edible foods you can grow in plain site that people won't have a clue about.
One example: Sun Choke, mis-named "Jerusalem Artichoke." They're like a small potato. They're perennial - only have t plant 'em once and they spread like wildfire. Plant a few - AWAY from your gardens - where they will look like just a weed. They above ground plant grows 4-5' and has small yellow flowers that look like small sunflowers, with the seeds. The tubers - "tiny potatoes" are very nutritional and would go a long ways towards staving off starvation.
There are also ways to store secret stashes in your house. Back in the middle ages, people used to hide, for example, protestants, from the "inquisition police" under the stairs: They put a unit of 2-3 stairs on hinges (inside hinges that couldn't be seen on the topside.) You simply lifted up these stairs like a door and, voila, a secret hidey hole. 
A couple good dogs, a few "weapons" are also good to have around - and motion detectors. Dogs and motion detectors are a great warning system and a deterrent.