Nissan Patrol....we've done lots of kms on both dirt and blacktop and no issues, except thd usual challenges on steep climbs.
Check the specs for both vehicle and van before you decide....its very easy to get it wrong.
Don't be misled by the "tows 3500 kgs" van is 2000 kgs so it must be right for the job....it may not be if you don't take all the weights into consideration.
Our van is just on 2000kgs and the car is rated to tow 3500 with a max tow ball of 350kgs but we are very close to the mark once we take all factors into consideration.....weight of passengers, Extras added to vehicle, extras added to van, actual measured tow ball weight, food, gear, water etc etc...
Getting this wrong is, in mho, the single most important safety factor for consideration and is best done before you buy.
Best wishes gor the search.