When I used to do golf courses,,,had 4 on the go for a good few year,,,,I used to right down where they were,,,ie 4 set on the second tea,,,or second fairway,,hole ect,,, I also used to trap a lot in the actual mole hil on the golf courses,,and of course just use tunnels,,,somtimes used to use ground marker spray piant,,,,and I had a metal detector