Originally Posted by DesertSMB
Diablo Drop off itself isn't too bad going down. However, the canyon at the bottom can be depending on what the recent weather has been like. The narrow section can get rather choked up with rocks if there has been high water flow though the canyon. If you can't make it through going back up can be tricky.
Thanks, DesertSMB. Yes, as I understand there are actually two descents within the Diablo Drop Off. The first one with some deep sand, and the second one that gets kinda narrow and rocky. Since I'll be going downhill, I'm not super worried about the first descent. If I'm not mistaken, the second one seems like the tougher of the two, at least for a full-size van.
Problem is, I won't be able to scout hill #2 to see if it's unusually tight/rocky until I've already come down hill #1. And, if hill #2 is not passable, turning around and heading back up hill #1 is not easily done in an SMB, according to posts above.
Maybe I'll call the Borrego Visitor center before I head out, to see if I can get any info on the trail conditions.