The choice of tent and camping gear is very important and can make or break a four wheel drive trip.
Car-top tents are quick to set up and provide shelter around the vehicle which is convenient for getting at things stowed inside, e.g. at meal times. Bedding is usually stored in the collapsed camper which keeps it dry in all but the most severe river crossings! Sleeping upstairs may also give you some added security if there is "wild-life" about.
The main disadvantage of the roof top units is that you cannot
leave the camp set up and drive off on a day trip.
This flip-top lid on a Toyota 40 series Landcruiser is by Eureka and is no longer a common item.
The standard roof is unbolted and a hinge fitted along the leading edge.
The inside of the roof is padded to make the bed.
The roof bars are by Rhino
so quite possibly the neat tent unit is also?
It is fitted to a short wheel base Nissan
GQ.
Alternatives: Four Wheel Drive Campers