We suggest you make sure the car is clean so that any existing damage is fully visible. Remove any personal items, especially anything of value. If there are any external modifications to the vehicle such as a roof rack which can be removed, they should be removed and stored inside the vehicle if they will fit. As a precaution, it's a good idea to cover or wrap your driver seat and driver-side floor mat just in case the trucker gets any dirt in the vehicle while loading or unloading. Remove any automatic toll devices and disable any kind of security devices which could give the trucker trouble when loading or unloading the vehicle. Finally, try to leave a quarter tank of gas in the vehicle to be sure there is enough for loading and unloading but not so much to start adding extra weight.