I did trap and relocate the big one I was having trouble with. Since then (crossed fingers), no problems. I have a fenced yard, but that doesn't stop them. They can DIG! I've long suspected there have been tunnels into the yard somewhere. I know there's a hole under the propane tank (outside the fence) and have tried to plug it up. There's also an older part of the fence that is wood and there's some room between the slats. We had one section of that old fence replaced with more solid wood fencing, but we haven't gotten around to redoing the rest.
