One year we had a family of skunks make their home under our shed. My husband wanted to just fill in their entry way, but I wouldn't let him unless he did it at night, since skunks are nocturnal and they would be buried alive, which sounded barbaric. My sister-in-law suggested using moth balls around where the skunks entered their "home" to discourage them from going in. Great idea, right? Wrong. Apprarently the moth balls killed the family WHILE they were under the shed. We called the town to help get the remains out. But they wouldn't do it since the skunks were dead on private property. Go figure.
The only way we were were going to get them out was to tear out the floor of the shed. That wasn't going to happen.
You think skunk smell is bad? Combine that skunk smell with the smell of decomposing flesh. It was a LONG late summer and autumn. The smell wasn't gone until the dead cold of winter. Fortunately, by spring the smell was completely gone. But, we haven't had a family of skunks move in since then.