We too had a perfect chucking storm on our combo to the point where the wife said "sell the trailer" an hour into our first trip. My first thought is you might be nose high but it doesn't look like it on the photo. Keep in mind that your hitch is a solid joint and all pin forces generated by your trailer are transmitted directly to the frame of your truck (the same frame your seats are bolted to). An air hitch will serve to dissipate most of those forces.
Our solution was to buy a TrailerSaver TS3. The trailer now merrily bounces around on its own with little force transmission to the truck. When you hit a bump you will still feel a jolt into the truck almost identical to when the truck is not towing. You can't feel it when the trailer hits the same bump. Can't see myself ever using any other hitch. The smiles start when you leave the driveway.
