This has been my situation for over two years now and I'm guessing will be for another two - first DD2 when I was picking DD1 up from kindy and now DD3 with both her sisters at school. I hate having to drag her around, disrupt her sleeps etc but there's no way around it. At my girls' school its a pretty frequent scene to see either a LO still half asleep on mum's shoulder, or mums taking it in turns to stay with two vehicles with sleeping kids in them while older children are collected (we have to collect our children straight from the teacher so you have to go to the class room)