Units were sent to 322 E/B, east of Port Royal exit, for a vehicle fire. Box 2-08. Tanker 2 returning from a call was first out. Capt2 arrived, reported a round bale well off in the bed of a pickup, towing a horse trailer. Tanker 2 arrived, deployed a handline and got a quick hit on the fire. Personnel hooked the bale and rolled it off the truck. Trailer was d/c and the pony was fine. Moderate damage to the truck. No injuries.