I packed mine around the 35 week mark I think. Here’s what I’ve done-
I’ve put everything in Ikea food pouches and written what’s in it in sharpie at the top, so DH can easily find what I need and pull it out.
Separate bags for me, DH and baby.
Complete baby outfits, again in Ikea pouches- every pouch has a vest, sleepsuit and hat, so DH can just pull out a complete outfit and we know if something has come out of the pouch it isn’t clean.
There’s probably some stuff you won’t put in the bag until you leave for the hospital if you use it regularly, like glasses or earphones. Write a checklist of everything you’re going to put in each bag and tick it off when you’ve packed it, so that when you’re getting ready to go to the hospital you can just look at the list, see what isn’t in the bag yet and chuck it in.
I have way overpacked, but then I always do (my motto is “it’s better to have and not need than need and not have)- we live a fair distance from the hospital so DH can’t really pop home for stuff, so I’ve packed enough for a few night’s stay in case we end up having a c-section.