In my bag (suitcase lol) were a few nighties, socks, underwear, sanitry pads, something comfy to wear home, travel soaps, baby soap, hand sanitizer
gel, hairbrush and hair ties, shampoo for shower/ travel set for brushing teeth,
nail clippers for babys finger nails (my sons were so long i cut them when he was a few hours old) nappies and wipes for baby, vests and jammy suits and an outfit to wear home. A blanket and spare change is a good idea too.