OP here...
So, after reading all your replies and the question from
@Rockcrawlerdude, I decided to not put on my WD/anti-sway bars on my return trip from camping. Short drive, good conditions. Perfect time to try.
TT is 22', 4300# loaded and 600# TW. And RAM is a 2500 Limited. The whole rig was definitely more stable. Significantly less bounce. I guess tire inflation was not the issue then. And when looking at the rig, the back of the truck is no longer up (as it is when unloaded) and looks pretty level. So does the trailer.
Seems like with WD, I was negating the positive impact of the TW leveling the truck. Now, only question left is sway. Did not feel any but again, conditions where great. No wind and little commercial traffic. I'll do a few more tests next weekend:
1) Actually measure how level the truck is after hitching up. Looks good as I say but want to ensure it's not off.
2) Try with my bars on again but applying very little weight distribution. Want to try this for sway and for trips where we may have more cargo.
3) Weigh the whole rig to determine if I could lower tire pressure to take some of the remaining bounce off.
I'll report back but any other thoughts, please pipe in.