Traction control systems and trailer sway bars

I would always use WD at minimum. I would running less than a Dual Cam system. My Explorer has the trailer sway control. Towing my 3 place snowmobile trailer I went over an ice covered section of road once, and you could feel the sway control working, the trailer had no trailer brakes as it was under 2k lbs. the system works, but I would want something working before I need the vehicles sway control.