My mom went through the same thing last year. She tried all the tricks in the book. What worked most reliably was baiting the traps with Little Debbie's Oatmeal Cream Pies. Any other bait and we caught who-knows-what. But the cream pies did the trick every time. We ended up relocating about 6 skunks from under the deck before all was said and done. We did it ourselves because out here due to rabies risk, they are simply destroyed after being trapped.