Frankly, by the branch structure of the first group of pics, it doesn't seem like a Prunus of any sort to me, either. If the berries are really in the fall, I don't think there are any wild Prunus spp. that hold their fruit until then. A mention of berry color might be helpful, Jason. If it has fruit, then it must also have flowers that would be more telling....
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I do think a willow is a good contender for the second group of photos, but not definite.
