Only issue I had with a U-haul trailer, was convincing them my 3500 dually ( with a duramax diesel) was capable of towing a triumph spitfire using a dolly.

When you go to rent a trailer or dolly, they put both vehicles in the computer and it decides if the combo is safe. Since spitfires aren't in their computer they initially said no.
They have no discretion in the matter as the computer will not complete the order if it deems the combo unsafe. The hitch installer heard our "discussion" and told the guy to put in MG. It took and I was off on my way.