Preparation, 1. We make sure that all parts under the van are protected as best as we can.
2. Make sure the interior of the van is packed so that things do not move around.
3. Reduce tyre pressures according to the terrain traversed. For us the reduction is 5psi for good gravel roads 8psi for corrugated roads and 10psi for tracks. Even more if negotiating sand.
4. When traversing these roads reduce the speed as well and one must drive to conditions.
5. Make sure that you have adequate provisions as road closures do occur after rain.
6. In a rain event that has a decent downpour we stop and find a place to wait the weather out.
7. As always use a reliable and capable tug. With plenty of fuel capacity as fuel economy goes out the door when roads are wet.
8. Carry good paper maps to assist the Navigator be it plastic or Human.
By doing all this our whole rig handles back roads with ease.
Last of all take it easy, talk to locals and you will enjoy the experience.
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I was tired yesterday and I'm tired today betcha I'm retired tomorrow. he he.
One thing to add is to pack bottles, cans, jars, etc that contain food and/or liquid in a manner to contain the spillage from any breakages or leaks. e.g. in say a plastic box. That way if a spillage occurs it's easy to clean up.
Drink cans can be a problem on very badly corrugated roads as they can rub through and leak. Stubbies travel ok if they're packed in shrink wrap. When packed loose in an esky or car fridge I've found it advisable to go over the twist tops and nip them up with a set of multigrips (or whatever)
I've always driven on dirt roads, and never let the fact that I don't have a 4WD stop me. But there are dirt roads and there are dirt roads...
A dirt road, or slightly sandy, or road base type is okay, but I've learnt not to go on gravel roads with big stones, after busting a hole in my water tank.
I just have to keep in mind that the Lucy and Lulu are low and drive accordingly. And make sure everything is secure, of course.
Screw top jars in the fridge (e.g. olives, capers,) can have the lids come off on long dirt road spells. I used to put each of these in a ziplock sandwich bag before such travel.
If likely to meet corrugations, check beforehand how well braced your fridge door is. Ours originally had the two hinge posts on one side, and a top fastener on the unhinged side. First time up the Oodnadatta Track, the movement on the unhinged lower corner caused a hinge post to give way and the door fell off. Was a lovely mix of stuff all over the van floor! We solved it, after that, by having a fastener in the lower part of the door, too, so all four corners were secured.