Wa State requires brakes on any towed vehicle that could gross over 3000 pounds. Our Jeep weighs over 4300 pounds so we have a brake system on it. but I can't tell the difference with or with out it when towed by the coach.
We have a flat bed trailer, equipped with electric brakes, it weighs about 700 pounds empty, but it can carry 7500 pounds so when we tow it with the Jeep we must have a break controller in the Jeep to control the trailer breaks. and yes it makes a huge difference with or with out it.
Rule 1, obey the law.
Rule 2, use common sense.