[fcatwo]

Air bags can be a useful addition when used "with" (but not in place of) a WDH. Some vehicles, such as minivans, are lightly sprung in the rear and air bags can stop them from wallowing even when not towing. I don't disagree with the statement that some pickups can get by with just air bags assuming they do not have a cap or are not otherwise heavily loaded in the back. IMO all vehicles will handle better with near equal weight on their front and rear axles and most pickups are much heavier on the front axle when not carrying a load. That's why we see so many with sand bags in the bed during the winter months.