It would be best if you washed everything before you go to hospital. They do recommend that everything is washed before coming in contact with baby...

Maybe if you are unsure on how big the baby will be, take a few of 0000 and a few 000's just to be safe...
You might also want to take some blankets, baby wraps, nappies (if hospital does not supply them).

The hospital didn't give you a list of what to bring?