Wily raccoons. I don't have answers for you either. We don't have a problem here, but then there are no woods near me. I think most of them who wander anywhere near my little town are relocated to the Land Between the Lakes which is a natural habitat to most animals native to this area. I suspect since it's so large, most of the critters are happy to be there.
I wish I could give you some advice, I just don't know of a thing they won't attempt to eat.
If I do run across something that seems to work, I'll for sure let you know.
Thanks, Linda.