m4ff3w wrote:
Apparently uhaul did used to sell clamp tow bars, so that moves me in the right direction.
Back when men were men and bumpers were chrome plated steel, U-Haul rented a "universal" tow bar that clamped to the front bumper of the car being towed with hooks, chains and (as I recall) spring-tensioned wing nuts. I remember that it weighed a ton, and I also learned that it didn't work very well on the front bumper of an air-cooled beetle.
I rented one at least three times in the mid-'70s, and even by my teenage invincibility standards at the time, it was a bogus setup.
U-Haul abandoned these in favor of the tow dolly. If you need it once, I'd recommend the dolly. If you need it regularly, then I'd look for a solution with brackets permanently bolted to the towed vehicle - like the RV guys use.