How am I managing? Well, we eased into it. DD #5 was born the week before Christmas,so DH took off the whole week (has not done that since baby #1), and then the next week was a company-wide vacation, so it was TWO WEEKS with him at home.
My first day alone, my older DDs did not have school, so that helped.
I agree that getting everyone in/out of the car is the hard part. I can't wait until spring, because we can easily walk to school . . .much less of a hassle. I keep telling myself that I will get into a routine, and that the other kids are only getting older, so they will be able to do more. (Obviously the newborn is getting older, too, but she has a much longer way to go!)
Actually, I think everything will get much easier in the spring. We have been having such a mild winter-- I know it will get bad, but I am loving it now.
And, I could not live without my wraps. I even bought myself a new one, because my tastes have changed. I bought no new carriers with #3 and #4, so I am due!
I started work again (I am a WAHM, part time) and am limiting how much I do so that I can have some time to just "be." DH bought me a Nook tablet for Christmas, so that helps the feeling of not going crazy when I am sitting and nursing.