A serious question directed to the OP, why a stash?
I'm with mrs_ursus on this one, 'leave no trace' is a good ethos, and quite incompatible with acting like a hamster.
He can't answer you, he's been banned.
I agree with the leave no trace ethos, but strangely what most of us are actually talking about are Cache's.
Cache's are by their very nature in line with Leave no trace ethos, they are situated near to indentifiable points, not necessarily blatantly obvious points, but identifiable ones which are going to be permanent. They are camouflaged so that other people or animals cannot raid or appropriate what you have left there. By their nature they have to be both off the beaten track and accessible along the lines of a wonky bend on a little used footpath.
Invariably the planning and siting of a cache is a complicated issue and the larger the cache the more complicated the planning becomes.
If the cache is dug in what are you going to do about the spoil?
Waterproofing and condensation, could this be an issue?
Insulation, are there objects in the cache whose performance is reduced by the cold?
Perishable items, food batteries and all the other things that we take for granted have shelf lives, when will they require replacing with fresh items?
Before someone brands me as some post apocalyptic survival nut job, I will point out that I have used caches whilst serving in the Army, I have had to find them, I have depended upon them for supplies, I have had to dig them in and I have had to camouflage them. I know the amount of planning that goes into situating a cache that I may not be the one to have to find, it ain't easy.