Family Pack Logistics

I feel like tying to use one main pack (55L) isnt working out like I need to.

My family is two adults and one baby.

However, spead loading essentily three peoples things in the one bag is frustrating. The reason I though one bag would be a good idea is because if only one of us (adults) is home at the time, one parent can grab the one bag and we will have what we need whenever we link back up in an evacuation situation.

Trying to fit two versions of things I feel isnt the best way. Id need two sleep pads, two woobies/ponchos and that right there is most of the bag.

So, is it best to get another main pack? 1 per adult and just grab one if only one person is home?

I can build out vehicle packs but they'd obviously be significantly smaller.