According to someone I read on Twitter, there’s a 92% chance that the Apocalypse will include zombies. If zombies can stand their own smell, they can stand your skunks.
The remaining 8% likelihood involves rabid badgers. I have no idea if skunks will help there.
I think a good hiding place is more important than perimeter control. Peeps gonna walk away from urban areas because bad people are gonna take over. Skunk* ain’t stopping no-one. They’re gonna be hungry and will eat any wildlife about. And pets. Maybe even other people. Need to hide, just saying. In the event of apocalypse I’ll be hiding.