Thanks for yet another spectacular trip report.

I'm (very) tentatively hoping to visit KSA in November, and Al Ula is on my list of places to explore. Was all the infrastructure (tourist bus, etc) for Mada'in Saleh due to the special event/festival, or is this going to be the new normal there?

Was the hike that you did above Madakhil camp arranged through the camp, or was that a separate guided service? I wasn't aware of this hike, and it looks spectacular.