If you're hiding food from enemies then you're going to pack it into isolated hiding places, not jammed together with 5,000 others in a feature visible for mile

If you're hiding food from enemies then you're going to pack it into isolated hiding places, not jammed together with 5,000 others in a feature visible for miles around and where everyone that the enemy might decide to question knows where it is. So storage, yes, but hiding it from enemies seems unlikely.