Don't forget that by May the two one year olds now likely won't have a morning nap at all so you will just have one needing a nap and can work your schedule around whatever it is if need be. My little one comes a 6:30. I give her a snack - drink and cracker at 8:30 and she goes to bed right after. If you wait too late in the morning they are really tired and want to sleep too long. Earlier is better than putting them down later.