Rear End Lift

For the life of me I cannot remember what sort of rear suspension Territorys have. If it is coils then some lovells extra heavy duty will help, if indpendent I would talk to a suspension expert.
Cheers Pete

From memory, the rear of the ford is the 'blade' suspension similar to the falcon. i.e. independent with coils.
Would look at an upgrade to medium duty variable rate rear coils first.

Hi there. We don't know if your Territory is 2WD or AWD, which makes a big difference in both towing mass and drawbar load. Also, you dont say what model camper you have. If it has a Treg coupling, it may be a Pioneer model, which is about a quarter of a tonne heavier.
If the back is down, then is the front up as well? If so, the experts say you need to take some weight off the back, not pump it up. Otherwise, you can be driving a lethal rig with not enough weight on the front wheels to keep it safe.
Do you know how much the drawbar weight is? How much gear do you put in the back of the Territory? If you have (say) 180 kg on the drawabar (about normal for a van like yours) and a fair bit in the car, your rear end sag may be more about overloading than about beefing up springs.
If the front of the Territory is up, then the rules are that you must lighten the load on the rear, or else transfer some weight to the front. If you are towing with a Territory, then you could well get rid of the Treg and go for a coupling that allows you to fit a WHD.
If the front of your rig goes up significantly when you couple up, then you are risking loss of steering control, which is really not much fun, expecially if you have the family on board.

I would be loading it up as if you are going on a trip and taking it down to the local weighbridge and see whats what.

Take wife kids everything.

Weigh the whole rig car you lot and all. = GCVM

then pull forward and weigh trailer only, disconnected from car. =ATM

Back it up and put ONLY the hitch on the weigh bridge and support it level with a jack or something like a block of wood .
Towball weight.

Then do the sums ATM minus towball weight is your GTM

Your car manual will give you the maximum figures which to stay legal and must not be exceeded.
Putting higher springs or Polyairs only raises the back and are really for lifting the extra weight in car only.

If the trailer is pushing the rear down it will be pivoting the car on the rear suspension regardless of what springs you have and lifting the front.

Nothing other than a proper WDH will alter this.

(A block of concrete on the front bumper will counteract it) LOL

Have fun