I think you are on track for the most part. There’s a previous history of domestic violence between the GP and BL but notes Gabby as the aggressor on more than one occasion. Whether that’s true or not only those 2 know between them. Their YouTube channel has references to him being OCD as well so I think put together they were a powder keg waiting to go off. At this point I think the most likely scenario was they had a fight and she may have been non intentionally injured to the point she died because of it and he panicked, dumped her and left. I hate saying that but it seems the most likely scenario due to their history and ages. The flying back to Florida mid trip is really questionable though, the bit about the storage unit… He also very well could have put her anywhere along the route back to Florida from Wyoming. Hope they are checking roads with toll pay/cameras as well.
A barefooted OCD person. Now I've heard everything.
OCD is generally a genetically-linked condition, quite distinct from OC
P. I see no signs that either of them is an untreated OCD (and I've interacted with many untreated OCD people - they typically have rituals they must do several times a day, to the point that most daily activities are organized around that). It's not a mild illness.
But it's also not to be confused with OC
P. Someone with OCD usually has no choice but to eventually interact with a psychiatrist, or simply never leave their house (they have a hard time holding down a job). Frankly, I don't think BL has either - but Gabby may have OCP.
Obsessive-Compulsive Personality Disorder (OCPD) - Psychiatric Disorders - Merck Manuals Professional Edition
My view right now is that since Gabby was not with BL on the day he was picked up at Coulter Bay, either he lied about them being in Idaho (odd if he would have hitchhiked from the Snake River area - with just that small backpack) or he never left Grand Teton NP after whatever happened to Gabby...happened. This last possibility seems more likely to me.
But Gabby's orderly and somewhat intense planning of the roadtrip, the amount of time it took to set up all those Insta-ready camera shots (many of them obviously needing use of tripod and timer and several trips back and forth between the dramatic scenery - probably with Brian being the 'placeholder' while she framed it
perfectly. the amount of time she put into designing and decorating the van (it's perfection, from a VanLivers POV)...to me, it makes sense that's she OCP. Most people who become aware of their OCP (usually by trying to have a relationship with a romantic partner) don't really want to be treated. Deep inside, they know they are right. Everything neat and tidy and perfect. What's not to like about that? Everyone should be that way!
But most people aren't. (I know several OCP people - with actual diagnoses from a psychiatrist and it sure isn't an easy row to hoe, to live with one, unless you're also somewhat on that spectrum; one of those people was my mom...my dad struggled with it but they worked out their "rules of the house" and managed to stay together for 60 years).