Regulations aside, Trailer brakes are just good common sense, on any trailer. I wouldn't run without them.
Consider that back in the 50's and 60's the standard family car was the tow vehicle of choice. Trucks were trucks, not comfy for travel like the pussy wagons of today.
simple up grades like extra leafs, (or helper springs), brake controller or hitch serge brakes and a trans cooler are really all that is needed to tow safely. Another thing to keep in mind is driving habits. 60/65 is top speed in ideal conditions. My sweet spot is 50/55 on the secondary roads. It kills me to see these "cowboys" passing at 70/80 mph with a camper or large enclosed trailer. The horse haulers are the worst.