U-Haul car trailer experience?

Nothing says you can't put more straps on the car once it's loaded. I don't always like the front straps only.

And absolutely go to Uhaul's website and use their decoder to see if what you want to tow will work. You'll be in a jam if you get there and they say sorry you can't rent because that combination won't work. So if it says your car won't work and you know it will, don't tell them that's what you're towing. Twice the decoder was wrong. The first time it said you can't tow a Corvair, but it worked just fine(the engine goes forward). The second time it said I could tow a Dodge Maxi Van just fine. It didn't end in disaster, but the whole trip was a disaster.

And my opinion is a tow dolly is not appropriate for a long tow. In town, sure, very convenient. A long trip, if one of the tires on the ground lets go, at the very least it will tear up a bunch of stuff. You don't need a failure with two pivot points behind you at speed.