Welcome to JOF
I agree, a WDH with integrated sway control is desired.
What brand/model of WDH with integrate sway control was your dealership recommending? I ask this because sometimes RV dealerships get a little confused on what a "true" WDH with integrated sway control looks like.
Equal-i-zer brand WDH and Reese Strait Line brand WDH are the most common.