Thanks so much for the replies!
We've already burned out one set of brakes through sheer ignorance. We have a Ford 150, and NOW we have the electric brakes for the trailer with controller. Our route isn't long, but in a couple of cases, it involves several miles of steep, windy roads, all downhill. (No ice or snow, ever!)
And during a recent trip, by the time we got home, I could smell that distinctive brakes-not-happy odor. Had them checked, they were fine, but I've been kind of worried ever since.
My driver has started down-shifting (automatic) but it's amazing how fast you can travel, even in first gear. So I was thinking 4WD might add a couple more brakes...hard to find answers to this.
So thanks again!