I find that even with an empty trailer where I dont need to use the bars for weight purposes, a minimum load on the bars does smooth out jounces. it acts as a dampener of sorts.

Are they just load levelling or multi function like my Reese dual cam? If multi function you will lose the sway control benefit of the bars.

I often wonder about new trucks with air suspension and people not using load levelling bars. Seeing this more and more. Is this air setup able to handle the tongue load of near 1K pounds like some fully loaded travel trailers are? Also the hitches themselves are rated for the higher capacity with the expectation of load levelling system, so if you dont use, technically you are probably over capacity for the hitch.