Two crews from Aylesbury, two crews from Amersham and one crew from High Wycombe alongside five officers attended.
Firefighters were called to a caravan fire that had started to spread to outbuildings.
The crews isolated the electricity to the site and used two sets of breathing apparatus, four hose reel jets, two main jets and a thermal imaging camera to extinguish the fire.
The caravan and number of vehicles were 100% destroyed by the fire.
Crews remained on scene for an extended period of time for damping down and checking for hotspots.
Thames Valley Police also attended.