I would take a laptop with some dvds so your dd can watch dvds unless you are sure there are dvd players in the hospital (we had many many hospital stays, but either dvd players had been stolen, or they were broken or they were all lent out).
Also some audio CDs, check they work on your laptop, they probably do, and ear phones for your dd for the laptop.
We also loaded some drawing programmes and simple games for dd on laptop. So with one laptop we could get lots of use out of it even without wi-fi.
The hospital usually supplies colouring stuff, but maybe take a favourite toy, some puzzles, books, children's magazine.
Some of her favourite snacks (crisps, chocolate, drinks, fruit, crackers).
I don't know if you have them, but for example those little plastic princess toys you can dress and make stories up or something similar, don't take up much space and she will be able to play with it on and off.
I would take some extra clothes for her in case she throws up.
Also a toilet bag for you. Including hand cream as you have to wash hands frequently/use alcohol gel which really dries out your hands. Also if you have any medication then take that, otherwise some paracetamol/ibuprofen just in case you need it.
Bottle of water for your dd (kids bottle as for school, so less risk of spilling water all over the bed) and one for you as you get very thirsty.
As others have already mentioned, also snacks/food for you, because she may not want to leave you once awake.
Good luck tomorrow.