Thanks for all of the feedback and stories. It's amazing how creative people have gotten to try to beat these things! We used to have an indoor/outdoor cat that helped, but she became coyote food (we think). Since we have kids, the new cat is now indoor only :(
Hmm, that could be an issue I'll have to explore.
I don't want to use poison since I don't want to potentially harm predators that would eat them.
Have you had success with gas?
I live on a rural property in NW Oregon with about 1.5 acres of grass fields. I've had quite the recurring nightmare of dealing with gopher and mole mounds. I've tried multiple traps and some repellants. At this point I'm paying a trapping company, which is expensive and slow (they only come...