I think I'm going to take your advice and switch over to large coverage spray emitters on the trees over 3 feet. Right now, I have bubblers on each side of the trees, but they don't cover the entire 360 area of the tree. Reason being, the emitters are cheaper. I can get a bag of them for $10-$15. But like I have learned the hard way so many times in my life. Don't go cheap on things you already have a lot of time and money into.
I have those gopher Cinch traps. They work pretty good. I just don't have the time to look for new holes and set the traps constantly. If I see snakes on the road, I always bring them to the ranch, and put them in the gopher holes. In fact 3 days ago I lifted some rolls of shade material and there was a kingsnake and a larger gopher snake curled up together. First time I have ever witnessed 2 different species of snakes cohabitating. Especially since the kingsnake preys on gopher snakes.