Thanks for the feedback. The setup I'm thinking about is like the truck in Lyle's pictures above, except a flat bed for more versatility. Couple or three bikes, or tanks and bikes, or camper and toyhauler etc. Side loading capable. Rack above for paddle craft or tinny boat. That sort of thing.
I like the way these fixed to frame style dollies turn the rear of the truck into a 6ft spread tandem when the steering feature is locked - lots of wheelbase stability.
These are not to be confused with an "A" converter dolly that turns the semi trailer into a wagon. The connection does not pivot at the rear of the truck like a trailer hitch. The "5th wheel" trailer is still a semi-trailer.
