Thanks again everyone!

I am thinking that once my 1st little one starts in a couple of weeks she will need to change her nap times because instead of waking up at 7-8 she will now be waking up at 5:30-6:00. Yes they are starting at 6:15 every morning... So by 9 she will probably be ready for her nap. My little one will have no problem napping at 9 as well. Then they both can go to sleep again at 1:30 with the older two. For the other 1 year old that isn't starting till may, I am going to see if her mom can start putting her on the same sort of schedule in the coming months before she starts. Hopefully she'll cooperate! But I'm sure once they are all here, if they all are sleeping, then she will sleep too... Hopefully!! I think that it is best to do outdoor time at the end of the day, otherwise I really don't know when else it will work.

Thanks again for all your suggestions.