Air bags will help overall. However I wouldn't depend on the bags to transfer weight. Bags can lesson rear spring compression and rebound
I pull a 10k car hauler with a 7400 lb blue tractor with the wifes 1500 chevy. I went with Sumo springs which helps stiffen up the rear spring pack. What I like about the Sumo is I can remove them in about 3 min when I don't need them for a stock ride. I thought about bags but for my use 6-7 times a year didn't make cents/sense for me.
My Husky Centerline TS WD hitch brings the trucks front down to normal ride height.