Wanted to post one more update on the Bilstein 4600 HD install; finally got out last weekend with full load and I can honestly say the new shocks are a great addition to the suspension system.
Rock/roll pretty much limited to 1 swing and then the truck just sits tight. Very nice feel.
To sum up our experience in building a better suspension system for our SRW truck and (heavy) TC;
* Tires/wheels. You must start here. If these are not up to capacity there is no point in going any further. This is a safety issue. Period. (Sufficient side wall tires will also minimize side "roll over")
* Supersprings. Straightforward, easy install, inexpensive, K-I-S-S.(Our GM truck has no top overloads. These are a great addition, minimize side2side rock/roll, and obviously help support the weight and eliminate sag)
* Bilstein 4600HD shocks. Firmed up the ride...very nice. No more harsh bumps, the whole suspension system seems firm/compliant.
* Big-Wig rear anti sway bar. Ties it all together so the components work as a system. (Our truck has OE front sway bar)
We started with airbags (last camper) and they were fine with the previous (lighter) camper. I never could seem to dial them in with the new (heavier) camper. I have minimal psi in them now-just to even side2side. Honestly they are pretty much along for the ride now. I would not add air bags if doing this again.
Every truck/camper is different. It took a few years for us to get to this point...but very pleased now. The rig handles nice and firm, driving experience is relaxed/competent.
Hope this helps.
Bill
p.s. Man I love this TC thing...every time we go out I am reminded of how kewl it is!