When is a good time to pack the hospital bag?

Katie • Married since Aug 2015 👰🏼 • Jackson born Sept 2016 🐉 • Hallie born June 2019 🪿 • Leo born July 2022 🌯 • Isaiah 40:31 🌻
Is 28 weeks too soon? I know I need to pre-register soon, so I was just curious.