An auto car on a tow dolly?
You will be fine with a tow dolly, and pull the driveshaft, keep in mind you will lose fluid when pulling the shaft.
Actually u-haul car trailers are complete garbage, surge brakes that have never worked on any that I have rented.
I was so pissed at the junk u-haul trailer I rented the last time, that I went out and bought a new car trailer, so I never had to hook up to that junk again.