Bash me if you like but you need a quality weight distribution hitch with built in sway control, like a blue ox or a 4 point equalizer brand hitch. As previous noted tongue weight has to be correct and trailer should be level. Setting up the hitch properly will require a trip to a weight scale. The sway bar you refer to I assume is one of the brake type bars, I honestly tried one and it helped but it really a bandaid on top of a bandaid. Lastly a 30 foot trailer with a half ton is marginal at best. I tried it and moved to a 3/4 ton. Just my two cents but pulling an RV is the reason I will never buy another 1/2 ton truck. Sent from my iPhone using Tapatalk