Longtime member here, but I’ve been away a long time, this case has hit close to home, though, so I’m trying to keep up on the threads.
I lived in Jackson until last year, another family forced out by the housing crisis the valley is gripped in. I want to provide a little context. Because of the housing crisis, many local workers actually live in their cars or vans, and these dispersed camping sites fill up with them as well as tourists. That’s good news, I think - someone local may have been camping in the area they’re focusing their search and have good info. Additionally, I’ve seen mentions of the sighting in Victor, ID, in that it seems an outlier. Victor is just over Teton Pass, a 40 minute drive from Jackson. It’s within the commuter area, and many people drive the pass every day to and from work (see: housing crisis). It’s a popular tourist day drive, and if they were considering going to Yellowstone, heading up through Ashton/Island Park/West Yellowstone from Victor would be a logical choice.
There are not as many dispersed camping sites available in Yellowstone, which may be why they didn’t go there, IMO. It can be impossible to find a place to camp in Yellowstone if you haven’t planned months in advance.
End of August, Grand Teton is just packed with tourists. Everything I’ve seen, even the dubious “hiking along the Snake River” is front country, they’re weren’t in the depths of the wilderness with that van. Every turn out, every point of interest, every road, every camp is packed with people in August. That doesn’t mean something bad couldn’t have happened to GP there, but it does mean I doubt BL was carrying GP bodily anywhere long distance.
Lastly, my husband and two kids and I rented a camper can for a two week road trip this summer and although we’ve been together 20 years and we’re both mild mannered well off adults, the stress of #VanLife was a lot! Finding a space that felt safe, going days without showers, the cramped spaces, the constant balance of labor, the feeling of never being able to escape the van was very real. Now, we had two kids driving us bananas too, but I can see how it could stress a young relationship and not be the idyllic life they thought they would be living.