Car seat and packing

Windy

I’m 34 weeks this Thursday and was wondering how long I should wait to put the car seat in the car? I’m trying to work up until I go into labor because i’m only allowed 6 weeks and I want as long as I can have with my baby especially since she’s my first. I plan on packing after my baby shower this Saturday but i’m trying to decide when I should load the car seat. Thoughts?