Two crews from West Ashland, one crew from Buckingham and a water carrier from Princes Risborough attended a fire involving a caravan and vehicle.
Firefighters used two hose reel jets, one main jet, two sets of breathing apparatus and thermal imaging cameras to extinguish the fire.
One caravan and one private vehicle were completely destroyed by fire, while a second caravan sustained minor fire damage.
Firefighters carried out damping down operations to extinguish remaining hotspots.