It appears our differences with regard to sway control hinges on the term BARS.
I now believe that what you are referring to is the Curt Sway control or an equivalent. Is this in fact what you are referring to?
If so. Yes this device does not require WD BARS and will act without them
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles