Another alternative would be having a bonded cat-sitter come in once or twice daily to scoop the box(es), feed and water. There would be no contact between sitter and cats so cats would have minimal stress.I would be gone for probably 3 days. If it were just one I wouldn't even be considering bringing her. I was gone for Thanksgiving for 1 day and she was fine, but this would be longer. I would expect some setback in her progress from this, I understand that. She would be isolated in a private bathroom as she is here, with access to only me. It is in the back of the house, away from any areas that would be loud or chaotic. The alternative would be leaving her here, and coming back one day for an hour or so to make sure she's ok. And then leaving again. But I'm not sure I can guarantee I'll be able to do that. I wouldn't be considering it if I felt like I could leave her alone here.