You can still Sticky Bomb the first two Trucks like in the walkthrough. Make sure to block the front entrance with a vehicle to hold off the one Truck from escaping. From good cover take out every goon you can before entering the yard to destroy the remaining Trucks. The racers will appear over the hill on the dirt road that leads up Mount Chilliad. Speed forward as fast as you can and try to ram the racers off of their ATVs. You should be able to get three of them while one will get past. For the racers that get dismounted, either shoot them from behind the wheel with an AP Pistol or get out and shoot them with an assault rifle. You need to do this quickly or they will get back on their ATVs and speed off. If that happens you will have to chase them down and this mission will become much longer than it already is. If any do get away, leave the now unoccupied ATVs alone and chase after the moving ones immediately. You might want to use one of the free ATVs since if you followed my advice you brought a large slow vehicle to ram the racers off their's.

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