Yes, its definately only behind a trailer with a 5th wheel hitch. And total length from bumper of truck to end of 2nd trailer can not be longer then 20m. I have a 26' 5th wheel and a 14' flat deck car trailer and was making inquiries. Its quite the ordeel to set up. You have to conteract the tungue weight applyed to the back of the 5th wheel by ballasting the front with additional weight so the 5th wheel still pulls correctly, and of course have proper wiring, brakes etc going to second trailer. Not sure what kind of set up you would need to just tow the jeep behind the 5th wheel without a trailer,,,maybe use a dolly so it has brakes, not sure. The guy I was talking to at a hitch store said you could throw a $1000 bucks at it trying to set it up and it still might not work out. So far I've stuck with the two trip method going out west,,,which sucks.