Take a plastic trash barrel out there and lay it down on it's side. Feed the cats in there a couple days and get them used to going in there. Then put your live trap in the barrel. When you get one you can stand the barrel up and toss it in the back of the pick-up and release the cat in a nice secluded place. Neighbors don't think anything about seeing someone put a trash can in their rig, but get a suspicious it they ever see the trap.