Oh yeah, I have experience with them.

I hate to kill them, so I didn't do anything for a few years. They multiplied like bunnies - my yard was a vole empire! They were on all four sides of the house, and it got so bad I was seriously worried about the foundation of the house (it's on a slope).

So I finally gave in and got some poison - rat poison pellets work as well as the stuff just for voles. Take a narrow trowel, or even a stick, and put it down into one of the tunnels (you can feel it because the dirt is really loose.) Move the stick slightly, dump a few pills in, and they'll fall down into the hole when you remove the stick. I cover up the top of the hole a bit so the good guys - like squirrels or neighborhood cats - won't go after it. You have to keep doing it until they're gone, but it does work eventually. I never found any dead ones, so I don't know if they died or just went somewhere else. But at least they're gone!

But I found that crossing your fingers & hoping they'll head on over to the neighbor's yard doesn't work.