If my truck had the 4r110 or 5r140 it would certainly help. A torque converter on its own does a ton of work, as does more gears!
I don't think this truck really needs airbags. I'm willing to bet I was way over on the tongue weight. I had the Jeep all the way forward for a few different reasons. I can get into those if anyone really wants to know. I did one stretch (from the park to lodging and back ) with the Jeep back 6 inches and the truck sat a bit more level and handled the same.
WDHs are nice when you have a load that is affected by wind or awkward. A jeep on a trailer that's easily moved around for tongue weight isn't a case where you need one, IMO.