I packed masses of stuff for labour and didn't use any of it. Not even the old nightie (I went nude and didn't care!).

Our hospital supplied everything for baby so all we needed was 1 outfit (000) to wear home and a hat when he was cold after his bath.

So you probably need less than you think :-)

My only advice is to get one of those 10 packs of cheap undies from Kmart you can throw out after and some nice herbal teas (check which ones are safe) as hospital tea and coffee is awful.