Hi Phil, There has been no problems in not using a WDH, the air suspension is excellent as it levels the car and van up perfectly and the van tows very well. Another good thing about the air suspension is when used with a rear camera on the car it makes hitching and unhitching a breeze. Just backup under the hitch, push the up button and the car comes up hitches up without leaving the drivers seat and all without have an argument with the wife. Cheers Alan