To get everything you want do three weighings.
First with trailer hitched and WD active. Weigh each axle. Truck front, Truck rear and trailer.
Next disable the WD and again weigh each axle.
Last go somewhere the trailer can be safely unhitched and then weigh the truck only. Again each axle.
When done you should have 8 different weights.
If you are using a scale with only one pad then do this.
First time with WD active front truck axle only, then both truck axles and last truck and trailer. From these three weights each axle can be calculated. Then the same with WD disabled and the truck only.