Hi jojo - Your holidays do sound fabulous! I'm happy for you and your girls with their progress! I don't know if there's any cure for the yips when both your girls will be grade-skipped, except optimism.
I guess I'm a bit confused. Do the receiving teachers not know that your daughters are being grade-skipped? And you've less than a week? If it's the receiving teachers, i'd try to set up a meeting right away. And is there a new principal, or do you say "outgoing principal" because you're switching schools? I guess I would want everyone related to the new situation up to speed.
Good luck, and enjoy the rest of your holidays.