Oh Lauren, that is a really good plan about the baby book.
Well, I plan on staying as long as I want (obviously no more than 2 days) so I'll pack for the whole time. I may ask for early discharge, but at the same time I rather enjoyed my stay last time

:
my pillow
nursing tanks
comfy nursing nightgown
a book or two
knitting things (optimistic, I know

)
lots of undies and good PP cloth pads
cloth dipes
travel outfit for babe (including warm bunting or something for the ride home)
car seat (obviously)
boppy (?)
baby book
rice milk boxes (like juice boxes, shelf stable) for cereal, etc
journal
sweat suit for me to travel home in!!! I agree, I was way to uncomfortable on the last trip home...
For DH:
2 full changes of clothes incl underwear

toothbrush
deoderant (he used mine last time too!!!)
pillow (if he wants)
deck of cards (came in handy with the super long labor last time)
??? not sure what else he will want. Oh, maybe my iPod