I shifted a van from Mount Isa to Mackay about 15 years ago. Wasn't a big van, an 18 or 20 footer, and I had an old EB Falcon to tow it with. It had a lot of stuff in it. Every little nook and cranny had something in it, I'd been living in it for a few years, as you kind of do in Mount Isa.

Got about 40ks out of town and after the third time I had to hit the electric brakes to straighten things up, I pulled off the road. I took everything out of the top cupboards and put it on the floor, and shifted a lot of stuff that was at the back of the van (like the heavy annexe canvas) right to the front of the van.

That turned a 80kmhr pushy swaying nightmare into a 100kmhr easy tow.

That's cool. OK, so 60/40 front to rear is the ideal weight distribution, and they show what happens if you have more weight in the rear, but what happens if you have too much weight in the front?

Edit: Found a longer video that goes over things in more detail. Got some good other videos like How to control trailer swaying. Cripes. You only have 3 seconds from the start of the sway before it will be out of control!

Unfortunately, our society demands that everybody has a licence. The social expectation is that if you do have a licence, you automaticly have the ability to drive a vehicle with a 3500kg GVM with a 3500kg Trailer at 110km/h, even if you are hardly competent enough to drive an Automatic Nissan Micra.

Add the fact that most drivers aren’t even able to change a tyre, let alone calculate GVM, GTM, ATM, ball weight, etc and you have a major traffic disaster on your hands.