[Kingkrs]

I just made a 2600 mile trip towing my wifes car with a uhaul auto transport trailer and there is a backwards sticker on the fender that says speed limit 45 so I can read it in my side mirror. I however went 70 - 75 mph regularly with high cross winds and had zero issues. I even reached 80 once while not paying attention to the speedo and going with the flow of traffic. That is not to say that I didn't have my mind on that trailer at all times though.

I would say not to worry about it. Just do like others said and make sure your load is well distributed and not likely to shift.