Traeg,
That's a fine looking truck and fine looking family. You should be real proud...
Suggest new set of springs from these guys. http://benzspring.com/
Brand new springs expertly made with new shackles and all the components, shipped to your door is more reasonable than you might think. If you rebuild the front and rear with new king pins and new shocks from your local NAPA, you don't really need bags unless you want to lower it or air helpers if you plan to carry heavy loads. (For that, you would need to adapt off the shelf components and fabricate a setup.)
Really like the patina on that truck. Like me. I'm not getting old. It's just patina...Don