J.M.
Last year we had a racoon mama and her babies living under our front cement steps. I called animal control and they had some steep prices so we decided to leave it alone until the nursing mama and her family left their nest. I think they were gone by July/early August.
Hubby was to seal off the holes, but never did and low and behold, last night, there was a FAT racoon hanging out in front of the steps. Looks like we'll go through this again this year - although with a toddler running around, I think we'll have to bite the bullet and pay for removal.
I don't know what happens with skunks - except the obvious, but we were told that with racoons, if the dog ate the droppings, it could make him very sick. Just a heads up. Our dog was banned to the back yard, but with kids, it's a very different story. Good luck!