Took mine for a six hour trip out on Friday. Oddly, the hitch rattles more on my brand-new witter bar seen here than it did on my scenic, disco, vectra or any cars I've had with towbars.
Changed my cable situation a bit because this car has a swan neck detachable whereas all my others have had flanges. Although looped over the neck, the cable and chain are attached to fixed points on the main towbar.
I found a secret menu some months back where I can trick my rear-view camera into being on all the time. I can move that red dot anywhere I like so positioned it right below the jockey wheel knob. Small trailers are much better at rattling these loose than large ones or caravans. This enables a quick glance to see all is well, but it's odd watching the road whizzing below backwards as you're driving along.
The blue drum in the trailer was brimmed with water and strapped right in the front of the tub for the journey there, 30kg there gave it around a 15kg extra nose weight which reduced the rattles by about 99%, eliminating my need for headache tablets.
It rode smoothly all the way there and back, I could have easily forgot it was on there.