I don't do communal sleeping .... I have one child per room and the oldest (3.5)is in the playroom. I stared putting fans in the rooms to drown out any criers. My two youngest were not great sleepers when they started. The older of the two started in oct and I had to move the morning nap to 8am and only for 30 mins. Any longer and I had a huge problem in the aft. Just before the break I took it away entirely. The other one just started at the end of nov and the am nap had to go right away and he still doesn't sleep as long as the others. However some days he sleeps 3 hours....so maybe try giving this wee one a short nap in the am because she might be over tired by the time you put her down in the aft.....is there a possibility to split a few of the younger ones up into different rooms? I have a pack n play in each of my bedrooms ... That inconvenience is worth it to me to have a restful break time.