I have air suspension on my 1500 and I love it. I do not pull my camper as we have a permanent park model. I did reposition my park model once and the air suspension wouldn't level the tongue height as I'm sure it was overloaded.
I do pull my 21' boat and the air suspension does adjust ride height automatically after the tongue weight is applied.
The only user settings to my knowledge is manually setting any of the 4 preset heights. Entry/Exit, Normal Ride Height, Off Road 1 and Off Road 2. It will automatically lower from Off Road 2 to Off Road 1 at 25mph, Off Road 1 to Normal Ride Height at 45mph and into Aero Mode at 65mph.
The best feature I like is backing up to my boat trailer. I enter into Entry/Exit mode (2" below Normal Ride Height) and back up to the trailer viewing the backup camera. When the ball is under the coupler I then hit the button 3 times and raise the truck 4" to Off Road 2 and drive the ball into the coupler without having to get out of the truck.