If you have a hand-set trap, get someone to make a longer throwing arm and throw "triples."
Set three targets on the arm, one goes wide left, one goes wide right, and one goes up the middle.
Two person teams. Person on the left has to shoot, and break, the left hand target before trying for the middle target.
Likewise the person on the right has to shoot, and break, the right hand target before trying for the middle target.
Both can shoot at the middle target in the event they both break their angle target.
If one of them screws up and shoots at the middle target without breaking their angle target the team gets a zero.
Start on the 24 yard line, shoot three times on each post for a total possible score of 45 (3 times x 3 targets x 5 posts).
Shoot three rounds for a total possible score of 135.
After the first and second round, move teams backward or forward a yard or two based on their scores (41 - 45 move back 2 yards, 37 - 40 move back 1 yard, 33 - 36 stay the same, 29 - 32 move forward 1 yard, 28 or less move forward 2 yards).
A good team can break a total score of about 125 - 130.