Not caravan related but I use my Omega to tow a glider in a trailer.
The trailer is, at a guess, 8 or 9 metres long. I have not the slightest idea what it weighs but the glider alone is IRO 300kg and the trailer is substantial. Steel framed with an ali skin.
Due to their length these can be nasty loads to tow.
The Omega tows this very nicely indeed. Power is obviously not an issue. Except on hills, it wasnt with my previous 1.8 8v Laguna TBH. I have burnt an unsuspecting, and slow reacting, chav off the lights with it behind the Omega, however
The Omega is much more stable than the Laguna, which wasn't rated badly as a tow car itself. I don't bother with a stabiliser as I generally don't set out to tow this over long distances at high speeds, and I don't always tow my own glider, so when I do have one on the back, I'm happy to plod along.
Having said that, the Omega will tow it happily at 60 without the slightest hint of snaking, even when descending hills. The Laguna let you know firmly when you let the speed get this high.
Towing at 60 ish, it'll sit in 4th gear at 2200 RPM (Auto) on cruise and only change down for the hills. It returns about 25 MPG doing so. I find cruise an absolute boon for towing as it's vital not to let your speed creep up, and this is only too easy in a V6.
Towbar wise I'm using Elite Pete's old Westfalia removable bar, which is a great piece of kit. Totally invisible when removed, easy to attach and solid once in place. It does have a steel bracing plate that bolts to the boot floor, however, which can be a nuisance. I fitted it myself in a couple of hours. No problem at all.
Electrics wise, I connected everything from the towing connector in the boot, after adding a wire to bridge the (absent) towing bulb failure sensor for the brake light circuit which was located behind and to the left of the glove compartment on my car. Details are all in the "Omega Electrical" section.
Anyway, that's about all the pearls of wisdom I've got on the subject.
Kevin