Here is a real world experience. I was towing a heavy utility trailer with a couple pallets of cement. About the limit of my towing capacity without a WDH.
It wasn't bad weather, but a bit of rain. I was coming down a hill and got some bounce while in the midst of a good turn. The front end lost the slightest bit of grab and the ANTI-LOCK/ANTI-SKID system kicked in.
Even though I was applying the brakes, the anti-lock system allowed it to move anyways. I had to straighten my turn to keep proper control (like steering into a skid) and ended up across the double yellow line.
Fortunately, nothing was coming and no problems. But those 1.5-3.0 seconds (seemed like minutes!) convinced me to move right away to WDH and properly distributed the load across both tow vehicle axles.
It's your life and that of your family. Stack the deck in your favor. Buy the WDH.
Granted, you got it home, and I may have done the same thing on a very limited and temporary basis, but set it up right and set it up once.
The piddly $$ spent on proper WDH, sway control, and brake controller will make your ride safer and may even make a huge difference some day that you may never even know about!
BTW, I am not one to waste $$ on 'feel good' equipment.