First welcome to the website!
Do you plan to tow a lot and are you considering exceeding the recommended towing limits in the owner's manual or on the hitch?
If you are coming close to maximum designed weight limits you would likely benefit from other upgrades too such as brakes, drivetrain etc.
You may want to spend some time reading older threads about towing so see what others have done such as using a weight distribution hitch setup in addition to airbags.
Not suspension related but many members have improved towing performance by adding a Magnussen supercharger too.
Good luck and hope you have many happy and safe miles in your AV.