I packed my bag and babies separately and used zip lock bags.
For baby, the usual clothes but in 2 sizes newborn/first size and 0-3, hats, swaddle, burp clothes, water wipes, and Saline (I meeded this for babies eyes were a bit sticky) pampers newborn nappies that's it for baby.
For myself, incontinace pants with boota organic cotton maternity pads, washable slippers / slides, comfy clothes and Pjs, nursing tops/vests/bra and mini toiletries.
Snacks!!!!! Lucazade sport, water bottle with a straw for easier drinking in labour. Labour snacks (easy to eat and high in energy) Dates and Prunes for Postpartum.
Peri Bottle with angled spout.
Spritz for your bits
I second the list pinned somewhere obvious for last minute things. Phone, charger, notes, keys, money etc etc.