This device EXCUSES REAL CAMPERS! No one needs it! Superfluous! Expensive! BUT HOT! Truma Mover XT 

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As flexible as you are: The Mover XT keeps you on track.
The compact Mover XT comes to terms with any surface and overcomes minor obstacles without any problems. So you can park it safely on any pitch. It is moved by brushless motors that are powerful, highly efficient and particularly light.
Here's what the Mover XT can do:
Handle inclines of up to 13 percent
Precise maneuvering
Easy, precise coupling to the towing vehicle
Automatic stop function
Suitable for single-axle caravans weighing up to 2300 kilograms
You operate the Mover XT with a handy, intuitive remote control. You use a rotary knob to determine the direction, and the slider to set the speed continuously - that's it.
In less than a minute, you can turn your caravan around its own axis, park it or couple it to the towing vehicle with millimeter precision. If the control buttons are not pressed, the caravan remains stationary. If you have switched off the Mover XT but not swung it off, you will be notified by an acoustic signal.