Keith and anyone else who this could be useful to:
I'm going to highly recommend reaching out to CaringKind. They're a NY based group that grew out of the Alzheimers Association, but chose to focus specifically on providing support for caregivers of individuals with Alzheimers and dementia. They have information sessions on was to alter your own behavior to accomidate the behavioral changes that happen, and I think it could be a real resource for you as you navigate this.
https://caringkindnyc.org/