No fifth wheel needed. Just chain the landing legs to a tow dolly with a center pivot and hall off. However having an air compressor connected to the glad hands and a pair of valves to release the parking brakes and apply the service brakes and hooking up the lights just might get you by a lenient understanding DOT Cop if you were not transporting on a major highway so long as the weight on the tow dolly did not exceed the tire capacity.
I pulled a 14x70 mobile home across 3 counties with my 1 ton welding rig by just adding totter style mirrors Obtaining over width permit was no problem either