A $60 Havahart live trap works well on raccoons, opossums, cats, groundhogs and skunks. It even works while you sleep, work, play. Just sayin
You can always purchase your own trap (within the law) if the rental fee seems excessive. amazon
We used this trap and used some canned tuna as bait. The burlap cover it comes with smells really bad so we just put a towel over it. We put the trap in the area where we usually see all the feral cats and went away for around an hour. When we came back, there she was in the trap!