Suspension help for our slide in truck camper

Just a friendly warning about the airbags, I have a Silverado 1500 that I love and haul an old Dreamer on. Look at the instructions and do not exceed the pressure called for as max, it should be about 50 or 60 psi. I had constant problems including a badly cracked frame rail due to overloading and using more air than the revised instructions called for, my instruction sheet allowed up to 100psi. Yes I have Hellwig bags, mine mounted in place of the bump stops, they were not centered under the frame either. My solution was adding leaves to main and overload packs and major boxing and plating of the frame and I was useing an overload spring with the bags. I roll down the road in comfort now. I have a regular cab eight foot bed truck, with a 9.5 foot camper.