I just put 1 plant per pot. Its going to get big being in the ground. You can just leave a few inches exposed above ground, I dont think it looks that bad. Or bury it completwly and use 5gal instead.
The traps go underground also, you put them into the tunnel and then cover the hole. Doubtful anyone would touch one. Once you get good with the traps, its usually just a few hours to catch the one you are after. Maybe your crew could go and all familiarize yourselves with the traps and eradicate them. Having a gofer infested gro area is a recipe for failure IMO.