For example the Stoney Creek trailer has a ATM weight 2260kg and 175kg Ball Weight. Would that be within its limitations
It should be easy but you have to think beyond the weight number.
Weight is just a measure of the pull of gravity. You can't buy a piece of weight but anything you buy has mass (the amount of material in it) and when that material Is put into motion, it builds up momentum and does not want to stop. That is why a car for example does not stop instantly when you put your foot on the brakes.
The same thing happens to whatever you put in your car or on the tow ball. On uneven roads, that material is constantly either falling and building up momentum or being heaved up suddenly. The forces going into load bearing parts like the chassis, axle housing, wheels, wheel studs etc are well above the forces they are subjected to while the car is sitting in your driveway or cruising along a freeway.
To make matters worse, those forces increase by the square of the speed.
Getting back to your 175 kg tow ball weight: I looked at Land Rover's web site a few years ago. The specifications section for their 4wd Defender ute said 150 kg on the tow ball puts 206 kg on the rear axle. That comes from leverage which is the distance between the ball and the axle.
I asked them a few questions about towing via email. Their reply said their 3500 kg off road towing capacity comes down to 1500 kg in off road conditions.
My next door neighbour had a 4wd Triton that towed a caravan. Out of curiosity, I asked Mitsubishi, once again by email, a few questions about Triton towing. One answer said they do not recommend towng the maximum ball weight in off road conditions but they did not give any reduced figures.
Weight distribution in the car is very important. I asked a Toyota salesman about the load the seats were designed to carry. He said while attending a Toyota training sesson, he was told the average weight of an Australian male. That is currently around 87 kg. Add work clothes and boots and you would have about 90 kg or 450 kg for five.
If you had a dual cab with that weight in the five seats plus a full fuel tank, then add enough bags of cement across the front of the tub out the back to bring it up to its maximum capacity, the car should look level from side on.
If you then put four of the men in the back of the tub, the car would still be showing maximum weight on a weighbridge but the rear end would most likely be sagging.
Nobody is going to load a car like that but plenty do it with their much lighter weight family and all the things they load up the rear end with.
That is when the air bags or stiffer rear springs go in. The car now looks fine from side on but the rear end of the chassis is under considerably more stress.
There is also a good chance it is now going to oversteer ( slide the rear end sideways ) in a fast corner or sudden swerve instead of understeer ( the front running out wider ) like just about every car in the world has been designed to do since the 1930s for safety reasons.
If I was in your position, I would start by asking Mitsubishi a few questions on their customer information service.
Make sure you weigh the camper trailer and its ball weight before you buy it. It may not be what the specifications say.
Decide and weigh all the things that you intend putting in the trailer before you buy it then add it to the trailer's weight. You may find that it is a lot heavier than you were expecting. Keep in mind that whatever you put in it will alter the ball weight depending on where you put it.
Have a look at the RV Books web site. It contains a lot of free reading on both caravan's and trailers. There is also a good book on camper trailers. I bought an early addition years ago. and it was well worth reading.
Have a look at the photos and information on understeer/overtsteer on the net. You will be amazed at how easy it is to change a car from one to the other when loading it, altering its suspension, playing around with tyre pressures etc.
Running around the bush is a good place to get tyre punctures and some of them can be very big holes. If you run over a sharp piece of something like dead tree roots and puncture a front and rear tyre at the same time, you will.not be the first one to do it. Have a look at the tyre information and repair section of the Beadell Tours website. It will keep you up all night trying to get through it.