Sounds like you've had a great summer and have learned a lot and have things dialed in.
On the air bag suspension, it can be tricky to use that in combination with a wdh.
The wdh works because the tension bars are applying a torque to the TV rotating the front axle down. If you set that up and then inflate a rear air suspension you are reducing the bar tension and moving more weight back to the TV rear axle from the front. Since the most important thing is to get the load on the front axle right while towing its generally best just the to use the wdh alone. As long as you have the tow vehicle axle loads well within specs it doesn't hurt anything to have a little rear axle squat, the TV was designed for that.
If you do use the two together then I'd suggest setting the wdh bar tension after inflating the air bags, that way you know you have the front axle load right.