I just wonder are they worth the extra cash.
After traveling with our full offroad van & others that are marked as offroad but clearly not you get to see why the extra cost is there.
I firmly believe that they are worth their money if you plan on using it offroad, especially in corrugations which will kill things quicker than other terrain. Dads Old van tore 2 shocks from the chassis & had issues with the cupboards after the one trip to the cape.
Tandem is the most common for ’off road’
Tandem is common/preferred due to its weight carrying capacity. We have single in our 15'6 but I wish id have gone with a tandem. There is less than a handful of places that tandems are banned, these kinds of things can be accessed in a tent. But carrying capacity would be an extra 300kg if id have gone tandem with my van. Id prefer the option to carry more over access into one area.
We have a Trakmaster, with shower, toilet, bunks etc. It weighs 1990 full, 1560 empty. My parents (After much convincing from me due to cost) now also have a Trakmaster, theirs is a tandem 15'6 & weighs about 1800 empty.
So far our van has covered Cape York, Flinders Ranges & all of the SA peninsulas & a few other places. We typically "free" camp when/where we can. Nothing beats a setup time of 30 seconds for an over night stop.
There has only been a couple of tight spots I didn't take the van, I could have with guidance, but it was easier to find another place or another way around.
I have plans to take it through the middle to the Kimberlies, still waiting for permission to do that one.