RobJordan: My wife owned a beauty shop for 27 years in the Windemere (bucks up!) neighborhood of Seattle.
Gopher (REAL Gophers!) capital of the U.S. of A.!
Each spring and summer the Doctors and lawyers wives would come to her shop at closing time and gather a bag of cut human hair!
These ladies would interupt a gopher run/tunnel with a shovel and place a handful of cut hair in the track.
Legend has it that the cut hairs would enter their soft skin/pelt and some how infect and kill them.
AND according to the many dozens of repeat hair gatherer/placers this is the MOST reliable/effective way to kill lawn gophers.
I prefered rockeries, landscaping and shrubs to lawns so I never got into the gopher killing myself.
Best of luck to you with whichever method of gopher eradication you choose.
Hold into the wind
VarmintGuy