Here's a video from a WDH manufacturer on the differences between use of airbags and a WDH to level out a tow vehicle/trailer combo. Biased of course toward use of a WDH, given the source. But, good info on what the effects are of both systems.
https://youtu.be/XBZu39pQ8Gg
This is actually a good video the result are surprising!
Excellent!
Thanks for the link.