This is considered the most "technical" portion of the WABDR as filmed by my dad on his Africa Twin sidecar in 2020. Lots of medium-sized loose rocks, but nothing overly difficult and as you can see at the end of the video the SMB just walked up the whole thing. I think I had it in 4HI to be safe, but I don't know if it was even necessary. Biggest concern with the van was size more than capability. Took out a chunk of one of the Bushwacker flares on a tree and we had to clear a couple felled trees along the way as well.
Campsite photo and photo of some of the clearance issues we came across:
As 'larrie' mentioned they are opening up a new version of the ORBDR this year and I am planning on giving it a shot in June or July depending on snow melt.