I'm not sure if you can even use a WD hitch on a Ridgeline, you would have to check with Honda. The problem is the WD hitch kind of "lifts" the front of the trailer transferring some weight to the front wheels of the vehicle. The Ridgeline does not have a full frame so I'm not sure how that would work. The friction sway bars act as kind of a brake to slow sway from side to side. We towed with just a sway bar for years and had no real problems. Bought a WD because we still got some bounce with certain road conditions. Your trailer probably has under 300 tongue weight so you would probably be ok with the sway bar. Just don't load too much into the bed.