The squirrels and chipmunks do have their own way of cleaning up after all the nuts have fallen. Yes indeed, they gather them up and hide them away in various caches for winter food. These caches are located wherever and in whatever is handy to them.
On one fall day, I went out to take a fairly long bicycle ride. Before starting out, I needed to pack my bicycle with what I needed. As I opened my panier, I noticed someone had been there before me.
I found that a squirrel had filled my panier with acorns!