
Well, first things first - you're definitely not alone; indeed you'll find people here in almost exactly the situation you describe - and they're able to offer some advice, but also in need of some of your advice as well. (I hadn't considered wilderness training for example, my own pwBPD is no longer a teenager but I'm curious whether you found it reduced her anxiety to be out of "society" some? My personal experience was that it was helpful because it wasn't usually "life" that caused the anxiety attacks, it was the inter-personal relationships...so encouraging time in nature often helped).
The co-morbidity between BP1 and BPD can be more frustrating than some of the other co-morbid pairings simply because it can be difficult to isolate whether it's the BP1 or the BPD that's dictating the current disaster. (Though keep in mind, don't blame all her meltdowns on mental health - teenagers are also just, well teenagers. Remember that even without the mental health issues, you'd be having SOME of these problems and letting SOME of this stuff slide). My "main" pwBPD isn't comorbid to BP1, but I live the kind of life where there are multiple pwBPDs involved. (But not myself, I had an intensive background check where they contact all the colleagues and relatives and run dozens of tests for a full-panel psych review and yeah, [sarcastic

], the conclusion is that I'm the sane person trying to take care of all the insane folks and that I'm qualified for it, lucky me).
Does she appreciate the increased attention from nurses, counsellors and such - or is she the type that shuns them?