you will only be able to smooth the ride out so much. recommend a good set of bilsteins or other shocks first. air bags are to help when towing or more weight in rear but wont necessarily give smoother ride, same with helper springs. sway bar will help with leaning but wont smooth out ride. the truly smooth ride only comes from a full on air suspension like on the diesel class a's. thats different from air bags. its too expensive to put a true air suspension on a class c, although it can be done. some ambulances, vehicles for handicapped, etc have it. the ride in a diesel class a is a world of difference, but so is the price.