Towing with a Hilux

Hi .....anyone out there towing a mid sized off-road caravan (Track Trailer Topaz, Aussie Off-Road, North Coast Camper etc) with a Hilux, and if so, what is your experience?

After three years of very happy TVanning we are looking at saying goodbye to canvas and changing over to an off-road van next year. That is a fairly expensive exercise of course, and I'd prefer (need!) do it without also having to change over the vehicle.

We have a 3 litre D4D Hilux as the tug, with a fair bit invested in being set up for the rough stuff - barwork, custom canopy, ARB suspension, long range tank, all the usual electrical stuff - also have had the mods engineer certified to approve a 400kg upgrade in the vehicle GVM, to 3100kg.

We have met one Topaz owner who is happily towing with a Hilux, and I'm sure that it would not be a problem on the highway or formed gravel roads. But we do a fair bit of serious driving on rough tracks, sand etc to get to the good camping spots - so far this year about 7000km including crossing the country from south (Googs track) to north (Mitchell Plateau) and then across the Gulf, almost all the way without touching the bitumen

Of course I don't expect to be able to do Googs with a Topaz on the back, but I'm wondering if the extra weight would prove a bit too much for the faithful Lux even on bush tracks and in a bit of sand etc? - an extra $80k plus for a Cruiser is out of the question!!

Any feedback/options from the owners of Topaz vans, or with other recommendations in the same categdory, would be appreciated.

Cheers