Here is another photo of my 'little buddy'. I have been putting bird seed out on the deck and as you can see by his full cheek pouches, he is packing it away!! I have also seen him picking up leaves in his mouth and using his front paws, he packs them in too, then disappears under the deck. I suppose he is insulating his nest for the winter hibernation. I think this one is a female but don't know for sure.
P.S. by clicking on a photo, you can usually get a larger version to view.