I've been dealing with these fuckers for at least 20 years. Used the Victor Easy trap above. Sometimes can get 'em in less that 10-15 minutes. Sometimes they bury them without tripping. I've even lost a few when they chewed through the string. (I use bailing wire now) Just caught one in the front yard tonight.
Over the years I've used Gopher Gassers, Road Flares, lawn mower exhaust, vehicle exhaust, tunnel fillers, repellents, coyote urine, bobcat urine, cat litter, dog shit, pretty much have tried and used everything. The only way I KNOW what is effective is to see the dead gopher, so I'm partial to traps.
My problem is that my property backs up to an open field, that's part of the school athletic field. I've read up on gopher behavior and know that, except in breeding and pup season, there's usually only one rat for a relatively large area. So I know when I trap one, it could be weeks or months before another moves into the now abandoned tunnel system. The school couldn't give a shit about the gophers in their field. (I've talked to the school board and maintenance people) I'll bet they will when some kid breaks their leg getting caught up in one of their trenches. To the side of me, my neighbor from hell has an RV part junkyard on his property and couldn't give two shits about a few mounds amongst his castle of crap. SO when I do eradicate a rat or two, it's only a matter of time before they show back up.
My dogs (Basset Hounds) are really good at going after the gophers, (that's what they were bred for) but absolutely useless for catching them. Their holes do more damage than the gophers. The only hounds I had that would actually do something were my Bloodhounds. One time I was in the back room and my wife started screaming bloody murder. I thought that one of the dogs sliced its foot off or something. Nope. Just my Pepper, sitting at the back door with a gopher in her mouth, by the nape of its neck, little legs flailing away. The other bloodhound came up with a half decomposed gopher, that he smelled and dug up. Took me an hour to catch him and get them damn thing away from him.
In any event I just ordered the Gopher Hawk, just so my gopher kill repertoire will have another tool. We'll see how well it works.
I'm like you, I have tried every single thing they sell to kill gophers. I like the traps also, ilike seeing them dead. I just bought a Gopher Hawk. First time I used it no luck, I think because the tunnel wasn't very deep. Second time a couple days ago I used again on a tunnel that was a little deeper and got him right away.