Don't waste money on store bought, fancy pants, citified gopher traps....embrace your redneckedness and build tiny little snares to trap 'em. Or if you want to go full blown Green Beret you grind a tiny little knife out of a larger knife then build a ghillie suit and wait for them to come out of the hole. Then you quietly come up behind them and silently slit their tiny throats with your tiny knife, then skin the gopher each time and when you've got them all....you use the hides to make a tiny hat.
Love it, but you forgot about pouring gas down the hole and lighting it.