I used air bags and a WDH with our 1st TT. Issue was that thw truck was carrying almost all the gear plus firewood and bikes. TT had little storage space. After loading the truck up and using 1,000 lb bars to return the front of the truck back towards the OEM ride height it made the ride very harsh.
So I added air bags and used bars with a 400-600 lb rating. TW was around 500 lbs. What I did was load the truck with gear then aired the bags up till the rear was at the OEM ride height.
Then hitched up the TT and set the front of the truck to the correct height.
Rode like a Cadillac. Best towing combo I've owned to date.