Do people ever form Tow Vehicle Syndicates? How does that work out?

I really never needed that.
I tow my 1300kg ArcusM Cobra trailer with a Ford C-max 1.6L TDI
diesel. That's also the max. legal towed mass for that car.
Excellent economy, excellent stabilty (surely much better than with my
partner's much heavier VW Tiguan).
Sure, we don't have many mountain passes at very hig density
altitudes, but still the turbocharged engine should cope with that. I
cross the Alps many times a year, though.

My trailer has single axle, surge brakes, and the stabilizing hitch
(it has friction pads surrounding the tow ball). The latter made quite
a difference compared to my previous set-up, which I used for years
anyway.

Speed limits in most of Europe are at 80kmh. By accepting the risk of
a moderate sanction, I usually drive at 99kmh GPS speed. At these
speeds, I hardly notice having a heavy trailer behind me.

In some countries, the limit is unchanged with car trailers, so I can
drive at up to 130kmh with no problem even when overtaking trucks.

Of course, you need to adapt your driving style to the heavy trailer.
No abrupt movements of the steering wheel, slower cruising downhill,
keep safe distance from preceding vehicles.

aldo cernezzi
www.voloavela.it