I took 3 bags to hospital. One was a labour bag with my food, camera etc in it. I also had my hospital bag & a separate bag for the baby (just used the nappy bag).
Take plenty of food, I took lollipops, tetra juice packs, muesli bars & fruit sticks for labour. Stuff you can easily eat bits of & hold in one hand that will give you energy. Plus you might want to snack while in hospital.
Plenty of maternity pads. I thought the Libra ones with wings were the best.
Those flushable toilet wipes - much more comfortable than paper after the birth. I also used them after showering instead of drying with a towel.
Comfortable loose clothes for easy breastfeeding. I just took tracksuit pants & breastfeeding singlets.
Pen & notepad in case you want to keep notes for a journal etc.
Alot of toiletries come in those little travel sizes now which is easier for packing in your wash bag. Take shampoo, conditioner, a nice loofah, some lovely smelling body wash.
Find out what your hospital provide for the baby. My hospital provided cloth nappies & nighties, though I didn't use them. I took gro suits, wraps, a hat & those snap croth singlets (don't ride up babies back). Also take different sizes, my baby was too big for the 0000 I packed. Lucky I also packed 000!!
I'd pack soon just in case. You don't want to be running around packing when you go into labour!!