Back in the 70's and 80's, I use to drive in the woods or on my place and attachea long piece of poly tubing to my truck tail pipe, stick it down the hole and wait for it at the other end of the tunnel. They dig a tunnel with an entrance and a exit.

When I had 10 or12 in the back of the pick-up I'd head to the black end of town and sell them for $2, $2.50, $3 and the big ones brought $5.Sometimes I would have 3 or 4 possums in cages and they would bring as much $7and $10 each. Same with Armadillos.