otgrl, Hi and welcome to the Toilet Teaching board.
Are you and the sitter doing the same thing for potty training? If you are that is great, if not I would highly recommend doing the same process. As for what to wear when she is home, I would recommend the think cloth training pants, you could go a step further and get the vinyl covering to put over them. When your DD would have an accident most of it be contained to the training pants. I hope that helps. Please keep us updated on your DD progress.