When we’ve helped ours it has been cleaning, cleaning and more cleaning. Two full days of it in one case We also had a box in the car of essentials for drinks, just in case, went out for food as needed and generally poured oil on the waters. Only unpacked anything when asked to do so, nothing worse than someone else organising your belongings. Oh, and try not to break anything. There was one occasion when Mr C managed to break a window - you can imagine how that helped . Even if you feel stressed don’t show it, calm is contagious. I’m sure it will be fine, we’ve enjoyed helping, odd though it may sound.