We are 3.3m high, but depending on what is on the roof, up to 3.6m high. If you build a Unimog, Camper, and don't take it down the small trails where the Nissans and Land Cruisers go, then you should have bought a simpler road truck with 4x4. Why use a Unimog as a base and then stick to roads
. The sides of our truck are scratched, pretty badly, from the bottom right to the top. Having proper branch bars on the front and roof, and chamfering the top of the box make it possible for us to drive down most tracks where the Patrols and Cruisers go. Where there is a big tree or branch that would cause a lot of damage, we have an electric pole saw, and do a bit of pruning.
When we get home, we will clean off the tree sap, see what we can polish out and look at some graphics and a film wrap to help limit the damage, we already have canvas screens for our side windows that have really helped with limiting the damage on them. The bars on the front and roof will need re-painting, they saw quite a lot of wear.
When we get home I'll edit some of the video from the Canning Stock Route, we had to push through kilometres of trees encroaching the track, but only had to prune one, but we did break a lot of branches on that track, and got a lot of scratches, but that's no reason not to take the truck down it, that''s what we built if for.
Something like the Unimog with "Luton Peak" / Cabover in the photos would make it really difficult to drive on most tracks here in Australia, wide, high and no doubt a bit top heavy. If you need extra space, then maybe a slide-out is the way to go.