I got weighed!

Well we both did!
We filled the trailer with what we think is 90% of the junk we plan to take on our upcoming trip to the NC Outer Banks.
So we were dying to know what this thing actually weighed.
We had to do a bit of fiddling as the first weigh seemed suspect with the weights seemingly much too low on the trailer.
What happened was that we were a bit too short to get good front & rear axle readings for the truck and for the trailer.
Maybe not all scales are like this?
The CAT scale staff were very nice. It helped that they weren't busy I guess.
So, we we were instructed to back the truck & trailer up on the scales so that the truck was on the rear "DRIVE" axle scale and the trailer was on the first trailer "TRAILER AXLE" scale. That meant we got readings for the entire truck, not, as I said, for the trucks front and rear axle.
I was OK with this as the truck was running level with 13 PSI in the airbags and drove the 20 mi. to the scales very smoothly.
Tires are Michelin Defender LTX M/S 286/60R18 rated 120H or 3086 lbs 130 mph.
For convenient reference, numbers from the manual for the LC are: GVWR 7385lb, TWR 8100 lb, GCWR 14,400 lb.
The truck itself had maybe 200lbs cargo in it but we're not sure we should add much if anything to the truck.
I can beef up the pressure on the airbags too I guess (springs and shocks are OEM) if we were to start to sag in the rear.
Based on the numbers I guess any weight we add ought to go into the trailer?
Here's the numbers and how we wound up weighing the whole thing:
On the scales on the "DRIVE AXLE" scale:
"TRAILER AXLE" scale: