Air Bags or No Air Bags?

Towing with a 2012 Ram 2500 HD 6.7L Cummins w/ 4.10 Gears. Crew cab 6.5' bed Using a B&W Slider Companion and love it. Trailer is 2014 Cougar 333MKS max weight is 12,600 average tow weigh is 11...