Update for those interested: I bought two Victor Out of Sight mole traps as well as two Nash chokers. I followed Judman's advice in setting them, but evidently too close to the hole.
I learned from a YouTube video that I was not placing the traps deeply enough. I also learned that moles in the eastern U.S. don't dig as deeply as the moles in the western half. I have a concrete fence footer between the neighbor and I which is about 8 inches deep. I followed a tunnel right under the footer, proving the theorem above.
In the meantime, the weather has gotten warm and dry here in WA. As a result, the moles have ceased most of their activity.
My neighbor to west has gone to the extreme of walling off his garden with plywood set about 18" deep. The same neighbor invited his retired father in law to kill moles with a $50 bounty.
So far, the man has made $50. To be continued...
