Hi Wobbles!
Been exactly a year since I had my boy but some things I can still remember being useful.
What I found most useful of all was I had a tendency to pack a small bag for the baby with their things in, a bag for Dad, then a bag for me and then a carrier with food and drinks and we ended up rushing into the hospital with my husband hauling all these bags after us - stressful!
So my main advice is get a small, hard suitcase with the wheels on! The type you take on a small holiday trip! And section if off inside with dividers or put things in small, clear zip bags inside it if you want to keep things organised and separate! The only bag I would have aside from your small suitcase is your partners - which I think should be kept in the boot of the car. He can get that when he needs it.
Useful things for your main suitcase:
Hospital notes
Phone chargers
Phone
Small change
Babies clothes
(I took 12 white and yellow sleep suits, 12 white short sleeve vests, 12 white long sleeve vests, 4 hats, 5 pairs of cotton mittens, 2 warm cardigans and 1 nice warm coat or snowsuit for going home, depending on if its winter when you have your baby)
Baby blankets 3 or 4
(2 really snug one, 2 cellular)
Baby nappies
(A good amount, I took about 28, I suppose it depends how long you are in for)
Baby wipes
(Again, a good amount because Mum can use these too - I took 4/5 packets)
Muslin cloths and bibs
A cuddly toy for baby
Note: if you are planning on feeding your baby formula from the off, I would also get your husband to pack a couple of bottles into the boot and some 1st stage formula and the sterilising equipment to leave in the boot. If you want to breastfeed, remember any pyjamas you pack are best to have buttons down the front so you can do this. If you have room you could also pack an inflatable nursing pillow, these can help first time breast feeders.
Large, black cotton underwear x10
Thick, cosy socks x5
Flipflops/sliders
(especially if you are using a birthing pool)
Large, comfortable, dark baggy night dresses x2
Nice pair of dark or heavily patterned pyjamas for photos once baby is born
Going home outfit
(I would suggest some dark leggings, a comfortable top - get your partner to put a jacket or coat for you in the boot of the car when you want to leave)
Maternity pads
(Be generous, they always come in handy, take a whole box, obviously remove them from the box to pack away)
Make-up
(This depends on the lady but I tried to be minimal here - I just took a great lightening concealer, WATERPROOF MASCARA! I cannot stress that enough! A nice lip balm/gloss, highlighter and some cream blush)
Towels (dark material, x2)
A very light dressing gown if you want, the hospitals are always boiling
Bikini if you are using a birthing pool
Mini travel hairdryer
Your favourite hair product and body wash and moisturiser/brush/comb
Bobbles/head band to tie your hair out of the way because you do not want that annoyance whilst in labour
A few light snacks
Cereal bars, energy sweets, a couple of packets of crackers
A bottle or two of water for labour - after then you can simply drink the tap water if you wanted to pack light.
Bendy straw for bottle of water during labour
Note: Have your baby car seat ready and installed in your car I would say a month before you are due. I know this sounds crazy but figure out how to work it, get it in and out, because most hospitals will not let you take your baby home unless you have the car seat there to take them away when you come to leave.
Extras that you may want to consider but are no way essential:
Battery fairy lights - some women have told me to put these in their hospital room has helped them relax during labour and also act as a night light during the night with their newborn.
A playlist on your phone for labour - again, some women have told me this helps having music on whilst in labour. Everyone is different but if this works for you, it's something nice to have organised just to use if you wanted it at the time or not.
Other extras include nail varnished and nail varnish pad removers. If you are big on your nails and are using a birthing pool, trust me it wrecked havoc with my varnish! I know this sounds crazy but whilst my newborn was napping and my husband was away, I took great pleasure being able to remove my nail varnished and put a fresh coat on. It made me feel human again.
Hope this helps!