I like the surge brake and sway bar idea.
You may already know this but I'll put this here for informational purposes for anyone else wanting to know about brake controllers.
Surge brakes and electric brakes are two different animals. The surge brake is built into the hitch and there is a delayed reaction to applying brakes to the trailer. Surge brakes are typically hydraulic. As the tow vehicle stops the trailer continues forward slightly compressing a master cylinder which sends brake fluid to the wheel brakes.
And there are two different versions of electric brakes as well. Progressive and timed. Progressive brake controllers sense the deceleration speed at which the tow vehicle is stopping and applies the same braking force to the trailer. Timed just senses that the brakes were applied and then ramps up braking force to the trailer. Progressive is the best way to go for the utmost in safety. Most brake controllers have a manual lever on them so that you can if need be activate the trailer brakes before the tow vehicle.
I already have my progressive brake controller but I still need to install it in my tow vehicle.
I've got a brake controller in my work truck but I've forgotten what system it uses. I think it's just a timed controller. But there is some sort of pendulum built into it so it may be the progressive.
It's a Hayes Energizer III. It acts like a progressive controller but isn't really classified as one.