Obviously you will have bleeding after the birth. In our birthing class with the first baby they suggested wearing maternity underwear because it would be comfortable and "disposable". I bought some just for the hospital stay and just tossed them (this time I just bought some cheapie cotton "granny" panties instead). A little wasteful I know, but I wasn't going to wear maternity underwear after the pregnancy and why bother cleaning them? And as far as the pads go, I just used overnight maxi pads after the first day or so (the hospital provided the large uncomfortable perineum pads). And I only got hemorrhoids after the birth, a rather mild case, and preparation H worked for me (I didn't feel like I needed it until after the hospital stay).
Good luck! (I keep checking your posts..to make sure there isn't something I am going to regret not packing for our hospital stay - thanks!)