schnackie It will work out fine. You're thinking ahead and making plans so it will all fall into place. We have eight grandchildren and have had sole responsibility for them many times. It's always easier in their own home with their own things around them. Even better if there will be contact with their friends. From our experiences I would say...make sure you know their routines, snack and meal times, going out times, nap times. Favourite toys are a must and those precious things they have to take to bed. One of ours took two dummies to bed - we didn't know this and couldn't understand why he kept asking for his dummy when he already had one! Also how articulate is the two and a half year old? Any weird family words can cause problems. We had one demanding a cup of tea - it turned out to be warm milk which his parents told him was tea. Many years ago my mother used the words 'do something else' for a poo. My poor brother, aged four, kept telling his friend's Mum he wanted to do something else and she supplied numerous alternative toys until he burst into tears and said 'I've done something else in my pants' Get those details right and you've nailed it. Five days will fly by, by the time you've got them up, breakfasted and dressed it'll be time for an outing, another nap or another meal. Above all else, enjoy the time with them .... you can always catch up with sleep when you get home! Have fun!