Dunno what kind of maternity pads the hospital will give u to use. But u may or may not like it. So if u want to prepare just in case, u can get those overnight 35cm pads to use in place of the maternity ones. :)
If it is just hospital bags, then you and baby home clothes, breast pad, toilteries, documents (if any for registration/discharge), you can bring breast pump otherwise no need (just direct latch).