Update
I have just towed the Crossover up to Bright. I ran over the free Vicroads weighbridge at Broadford. The car axles were 2900 kg - and I had very little in the car! The camper axle was 1650 kg.
Interestingly, I had to put more air in both front and rear tyres. Both went from 40 psi to 48 psi after around 100 kms. A few extra psi brought them back to 45 psi. I did not have to add air to the original Michelin Lattitudes. Not sure what is going on there.
The Hankooks were comfortable and handled well on the bitumen.
Cheers
Numb Thumbs.