Looks like a very interesting journey! How long did this trip take? Do you have an estimate of how long it would take to turn around at Eureka Dunes and finish up at Furnace Creek?

Hmmm ... that might be a little bit too much driving for one day. Doable, but I would recommend to stay over night by the dunes.
However the majority of the Big Pine Road was in very decent condition when I was there so if you would want to drive back same way it shouldn't take longer then hour and half to get back to the park main road by Grapevine.

I wish I'd seen this site prior to our recent trip. We spent 3 days off road and went from Ubehebe over Hunter mountain and down to 190 through South Pass. Beautiful trip. Nice job documenting your trip.