Which type of car tent to hire in Namibia

I would recommend a 4x4 if you are going for a roof tent, make sure you bring some form of puncture repair kit should you snag it on bushes!

A quick reply on Lucy_’s entry, the main subject is about Namibia and not Mozambique. Moz roads are totally different from Namibia. Namibia’s roads, tarmac and gravel is by far better than any of the Southern Africa’s countries. I live in South Africa, traveled extensively in Namibia, Botswana, Lesotho, a bit of Zimbabwe way back and Mozambique.
I’ve driven thousands of kilometers in Namibia in a Datsun 1600 sedan and, yes, got stuck in the sand, trying to view a pool close to Walvis Bay. But did not try to explore regions off the beaten track e.g. Van Zyls Pass with a sedan vehicle!
Since the mid 90’s, all my travel is done in a Land Rover, by choice. Only few visits to Botswana I had the rooftop tent on the roof of the Land Rover. Yes, the view is great, yes you feel safe but if you are of average height, zipping and unzipping the rooftop does not take a minute, only the push open and the collapse. I’ve traveled alone in these regions as well and then it takes me much longer to unzip and zip. Yes, there are basically two models of rooftops with various manufactures and models; the “hardtop” more expensive to buy and hire, and the “soft top” cheaper and more available. The hardtop goes like one, two, three and off you go.
The other problem I had was visiting national parks. An hour or so, just before sunset, you receive a message that there are lions, 2-3 km away from camp and you want to go and see. But, your rooftop is already open for the night because to setup camp at night is problematic! Now you can not go a see the lions!
Getting dressed and undressed in a rooftop is for the young. My wife likes the wild bush but she still likes to dress in an upright position! When it rains, a rooftop is not a very pleasant place to be as you are limited with space.
Then my family grew and I removed the rooftop and fitted it on top of my trailer, what bliss. Now the Land Rover is available for any lion sightings. The kids were now sleeping in the rooftop and the parents in a 3m x 3m bow tent. No one “steels” my campsite anymore as it is marked by my bow tent, ok, including my trailer, which was not the case with the rooftop on top of the Landy.
Temperature wise, never felt uncomfortable in a rooftop or ground tent as both versions have adequate ventilation, keep in mind that my rooftop and bow tents are made of thick durable canvas. During daylight you do not spend time in any tent rather in the shade of the vehicle or underneath trees. Due to the thick canvas, I never had any problems with leaking, only along the West Coast in October while visiting the flower season. We were camping close to the sea and there was a strong icy wind plus the heaven opened. The tented started to leak at the seams facing the wind.
Conclusion, I will go for a ground and more precise; a 3m x 3m bow tent!