I think this is a really tough one. Pondered my bag for ages and baby came at 38 weeks (and bag wasn't finished as I thought I had plenty of time to get it right) - I was literally running around the house at 3 am saying I haven't packed my straighteners, do you think I need to bring my hair dryer? (I was in the delirious part of labour but didn't know it...baby was almost coming out lol)
I did multiple bags.
A small one for me for labour, things that would make me happy / keep me calm: hand cream, lip balm, hair bands. Plus a nightie to give birth in, cossie for the pool, clean nightie, big knickers and a few pads for immediately after.
A small baby bag, blanket, hat, couple of baby grows and nappies. Kept this in the car so my hubby went for it after baby was here - hospital put on first nappy and wrapped him up for a while.
A bigger bag with clothes for me, wash bag, hairbrush, more knickers, pads, make up etc. was a while before I had a shower as I spent a long time holding the baby, feeding etc. again, dh brought this in after birth.
A man bag for dh with iPod, magazines, some little toiletries and toothbrushes, clean t shirt, camera and change for parking. Plus emergency numbers.
Them a box of snacks in the car - mini cheddars, pretzels, wine gums, cartons of squash, dried fruit.
During labour we had my little handbag and dhs man bag and a big pack of apple juice cartons. The only thing I asked for during labour wash apple juice. Nothin else was touched.
Sounds like overkill I know, but I felt really prepared and all the stuff was in the car if I neede it. Got complemented on how light we traveled (good Job they didn't look in the boot lol)
Good luck !