With a tow bar you risk the tire flop problem, with a dolly you have difficulty backing up.
Backing up with a tow bar is also difficult.
I towed a 54 GMC COE from WA to NY for a friend, with the tow bar pictured in an earlier post.
I did not have any problems with the tires flopping around, and I did not tie the steering wheel in any way. I would think that the proper caster angle has a lot to do with it. Occasionally at low speeds I would turn and the COE would not turn, but it had no choice but to scrub the tires and follow along. It helped that my truck weighed 10,000 lb empty, and I had a little over 3,000 lb extra in the bed, and plenty of power and gears.
If you must use a tow bar be sure to have a truck at least as heavy as the truck you are towing, more is better, and have plenty of weight in the bed. That helps to keep the towed truck from pushing you around.
Take it slow and careful.
A good sized flat trailer and suitable truck would be best.
Or better yet, how about a roll back? You don't even have to drive, and if you are flexible on the time you could get a deal on a back haul for a local towing company.
Grigg
