With or without the cab over bunk?
Either way, if you're running the unit loaded for travel at close to the GVWR 11,030lbs, on soft tires, there's not much you can do.
Others have tried everything from air bags, to sway bars (Helwig?), to stiffer shocks, to whatever.
I have noticed some handling improvement from adding Sumo Springs constant contact bump stops, front SSF-106-47, and rear SSR-338-54.
That's as far as I chose to go. I also run my tires at 75+psi all around to reduce the mushiness of the ride, but leave a little room for temperature expansion/contraction.
You may find that you'll get used to the crosswind and truck bow wash wander over time.
I hardly notice it now, unless it's really bad, and then we just find a place to stop, and wait it out.
