Hello & congratulations on your new baby girl!!
I, too, had an in planned c-section, then a planned one...although, my 2nd came before my schedules date.
You realt don't need much at the hospital. I wore the hospital gown & socks. I brought a robe, which was nice. Then a change of clothes to go home in. Something big & loose b/c you'll be sore. As far as the baby goes, mine wore what the hospital provided. They have everything there that your baby will need as far as diapers, etc. then of course, an outfit for her to wear home. For my friends w/girls, they brought tons of bows, different outfits, etc. I have boys.
Then you'll need your toiletries. My hospital has shampoo & soap. I brought my razor, hair straightener, make-up, deodorant, & that's it. My hospital has toothbrushes & tooth paste.
Also, don't forget your still camera & video camera, along w/extra batteries & chargers.
Cell phone & charger.
Laptop to upload &/or email photos of your baby.
I think that should cover it.
Best of luck & congratulations again, on your new baby!!