Our new 1.4 acre property is ridden with gophers, rabbits and voles. It's part of the package when you buy property on the edge of wilderness.
We have an entire vineyard to plant, figs, and many other fruit trees.
Procedure is to dig the hole. Fill with water to check for intrusion into gopher tunnels. Plug any tunnel with huge rocks. Insert gopher basket into hole with 6" above ground. Put plant into basket and add soil and vitamin B1/water. Make sure drip system works and circulates around plant.
Voles/Rabbits: Make 24" high tube of gopher wire and put around basket to prevent voles or rabbits from eating tender new tree trunk and leaves.
What you see is a LSU Gold fig tree beginning it's life in-ground on a steep slope. It is well protected at the moment, and will be monitored for any pest invasion outside it's cage. Climate is what the fig craves! It will be watered long, deep and spaced to send it's roots deep.
This LSU Gold is over one year old, was planted late March 2013, and is doin' fine!
The hillside is so steep, and decomposed granite is so slippery, I bought a cool hiking staff online. It gives me a third leg going up and down the planting slopes.

The slope is steep, and there is drip irrigation, but to stop the dirt from sliding, we use anything we can!
I've got the juicy fruit gum, the gopher bait, but it's tough finding those active tunnels. Next job is to buy about 20 baby gopher snakes and let them loose!
Suzi