More suspension help!

[Rickj91]

We have a 2013 Wolf Creek 850 on a 2005 Chevy 2500HD (no Overloads), with the Duramax with 120,000 miles on it. I still have the original shocks. Truck rides fine with the load but I get about a 3 inch sag in the back from the empty position. I am thinking about Monroe Reflex Light Truck shocks vs. Bilstein 4600’s and adding Super Springs. I do a lot of back country camping for fishing and hunting as well, and it performs just fine. I also pull a Cargo Trailer which adds to the sag in the rear a little, when attached. I have read all the posts on here and get confused as to the best route to take. First I am wondering about the shock choice, and then if the Super Springs will help with the sag in the rear.
I am very impressed with all the knowledge and experience on this site and it is my daily read each morning. Any ideas or comments would sure be appreciated. Oh, Love our Wolf Creek 850, after many campers, 5th wheels and travel trailers.

[Reddog1]

My vote is air bags, no compromise in ride or height.

[Super_Dave]

To me, it sounds like the path you are headed down would create a large compromise in your unloaded ride. What was your opinion against adding air bags and overload springs?

[cewillis]

There are many ideas -- here's mine. (spring shops can do this a lot easier than I did) My 2006 2500HD rides at stock height with almost 3000 lb total load.