A fire extinguisher is a must. But be careful of the dry powder ABC type ones. The powder is nasty & corrosive. Discharging one on a vehicle is worse than hosing it off with salt water. Powder gets everywhere in the area too.
CO2 or water fire extinguishers arent as effective in most situations, but have little to no cleanup issues. Given you are there when you start the fire you hopefully can get a handle on things before they get out of hand. Hopefully with an easy to cleanup extinguisher.
