I don't know what or how you mounted your air bags, but to get my to work and mount properly I had to remove the overload spring pack. Know I do not miss it, the Air Bags more then make up for them. My air bag also help smooth out the road, and it is very noticeable, empty or loaded. If you are not going to invest the time and money to install an on-board air compressor, with the right controls to properly inflate or deflate the bags, then do nothing and save yourself the headache and money. I would rather not have any air bag system, then to have an half/assed one, the beauty of the system is in the control.
I also use the BFG Velvet ride Shackles, they help smooth out the ride as well.