Some states require 2 chains when towing, not one. Here is a summary of requirements by state. https://drivinglaws.aaa.com/laws/trailer-hitch-signals/
I know of at least one instance out in, I believe, the Nevada "boonies" where the European brake cable activated the trailer brakes while towing and the driver was oblivious to this. A dual axle Cobra being towed by a truck if memory serves (someone correct me if I'm wrong). Anyway, it caused a fire..
Lastly, I used to tow with the tongue wheel on, but Noelle and others convinced me that it is best to remove it prior to travel. The wheel loosens up and spirals down to the ground. The rubber is quickly ground off and then it gets messy. They aren't cheap either. She has sold many replacement units..
Just something to consider.