When trapping any type critter, if it works keep doing it. Give tunnel traps time to be visited. I go 2-3 days with similar mole traps set in pairs bidirectionally and pull them up as such. If I catch one in five pairs withdrawn I'm doing well. Doubles are rare but I've had a few. There is no battle, underground trapping is a war.
Cat D3, Deere 110 TLB, Kubota BX23 and L3800 and RTV900 with restored 1948 Deere M, 1949 Farmall Cub, 1953 Ford Jubliee and 1957 Ford 740 Row Crop, Craftsman Mower, Deere 350C Dozer 50 assorted vehicles from 1905 to 2006
When I moved here the rear yard was a mine field...
It took several months the get a handle and now if I see fresh dirt a put Answer down the hole and done.
Cinch traps are the way to go for gophers...get about 3-4 of them.
If you are going to leave then traps set and be gone for x days, it's wise to attached a small flexible chain and secure the chain w a metal rod. Otherwise, an animal will pull trap up to get the gopher and run off w them both....good luck !!