Welcome to the forum. An air ride hitch or air pin box will dissipate most bouncing forces before they reach your truck. These would be bouncing forces from road imperfections and small bumps. You still have almost a ton and a half of weight in the bed of your truck so large bumps and heaves like railroad tracks will still be felt. Can't hide from that.
If your trailer pin is bouncing on smooth roads then there are other issues. Where I live smooth roads are very rare. Make sure your spring shackles and hangars are in good condition. Shocks on the trailer are a good add.