Willow my DS was born at 1.10am so, smack bang in the middle of the night! However, our daughter was over 5 years old then so double the age of yours and Liz's little ones.
She always hits the ground running when awake and that's what she did. Our next child was born at 6.24pm and the next at 10.26pm. I have gorgeous photos of my children asleep with me on the bed about an hour after our last daughters birth. They were exhausted. The hospital did up mattresses on the floor and a cot for our 15month old and DH transferred them into bed.

So, I have never had the experience of a middle of the night transfer as such! However, if your children have a trusted carer - take a portacot or an inflatable mattress that their carer can make up for them to nap on. This may be helpful if they won't sleep in the pram. I also did up "show bags" for my kids for each birth. Just one of those colourful gift bags you can buy from dollars and cents stores. I put in it a new book, snacks they don't usually get! Juice, cheap dollars and cents toys and novelties. They were given to them when they started to gt a bit figety. It works a treat...

Something else I always do is that my kids choose a teddy for their new sibling. When the birth is over, the next day the bear is presented. The next day the kids all get a gift from their new sibling and from us (parents) to thank them for helping. It may be something you may like to think about.

The other thing that is helpful is - if you are planning on having music for your birth choose what you will have and play it in the house often. Explain to the kids that this is the music that their new brother/sister will be born to. If you are having candles (often not allowed in hospy) or other things at the birth let the kids help you choose. Oils to burn etc. Let them feel like they are choosing too. This really helps make it a family birth... My kids all help DH dress the new baby etc etc.

Well you gorgeous women have served to get ME excited! Whatever you decide and however you decide to bring these new babies into this world I hope it's all you both want. :hugs: