Thank you to everyone on here hoping, helping and sharing info.
I am Barbara's nephew, and though i don't have much to add to what you guys have gathered i can share that Barb and Robbie were regular and avid campers. besides the rv they also regularly camp on their day boat on the Colorado river. They are both outdoorsy people, and regularly traversed the desert. she collected rocks for their rock garden and was fond of gnarly wood pieces. they both also liked bottle hunting and finding leftover prospector knickknacks, flints etc. lots of interesting items they'd found and collected from their desert walks...
i went on the river with them once, and they also took our family out in the desert when we were kids, maybe fifteen years back. I can confirm they're from Bullhead, though they often spend summers in Canada, where I believe Robbie's family live. They were all about the desert, and I'm not sure they would have even been in an actual campground or official campsite. They spent time outdoors like that all the time. And bikini, beer and hiking boots is accurate. That's her style.
I'm shocked Robbie would have let her get ahead of him, but just indicates to me how well they both must have known the area. I heard from my father (Barbara's brother) that after failing to find her at the RV Rob began searching the area, including a nearby cave they both knew about, incase she'd gone there to escape the heat. So this is a place they camped and explored regularly... All my info is coming second and even third hand, or from the same news sources you guys are seeing. I've actually just learned about this today, as I'm travelling at the moment.
My father's health is failing and Barbara was literally flying to visit us in Hong Kong next week. I'm not sure if this is relevant, but understandably my father was not immediately notified of the severity of the situation, as his own situation is dire. When Robbie finally contacted my family in HK to share this devastating news, my father's wife and my sister report the story he told was almost unbelievable. Robbie also reported he'd been detained for most of a day as a suspect.
Just last week I received voice messages from Barb concerning my father's condition and whether or not she should push her trip forward. I've had trouble contacting her, but this was no surprise to us as her and Robbie are often comfortably beyond cellphone service. I am not the most easy to reach either, so our calls kept missing...
I am grateful this community has jumped on this, and frankly am still in shock. Feeling a bit helpless and can only hope and pray.
I've not been a very active part of Barb or Robbies lives these past decades, or I would have more details to share, but I can say these two were no strangers to the rocky hills around Arizona/Nevada. They were seasoned enough to feel casual in the hills and the heat, and the news reports I've read aren't making it sound that way.
Thank you all again for your concern and your efforts to dig into this.