So, apparently, if you see a skunk scurry under your porch and want to know when it has left, so you can create a better barricade, one method is to put a little flour near the escape and see if the skunk messes it up on its way out.
Unfortunately, if the skunk waits until you are asleep to make its nightly rounds of digging in garbage cans and whatnot, you have to figure in the morning that it’s back in there.
So now we’re thinking about rigging up something with nails pointing at an angle so it can slide out but can’t slide back in. Any other advice you can provide in the comments is welcome.
It is prime dog-getting-sprayed-by-skunk season, so whatever prevention lessons can be learned by/from humans are good … because, frankly, dogs would much rather get sprayed every night than ever learn a lesson.