I did the route almost exactly a year ago.
Traffic was pretty heavy at that time and if your car was fast enough you could follow another group who either knew the route or had a guide.
Part of the reason for heavy traffic is the bottleneck caused by the dahkla convoy. If that is ended when you get there, the trafic will be spread over 7 days a week, not 2.
Don't do it without another vehicle. And even if possible without a GPS, you can buy an older unit that will work great in the dessert for $50 us. It would be stupid not to.
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