I think it's always a horrible few days before DH goes back to work. Whether you have 1 child or 4.

Four kids can be tough but do was one, two and three. Generally I live four, some days you feel out of this world busy but others I love the chaos that four create. Mine get along so well and are different kids for the experience of bring one of four.

I think you will find DH going back to work no where near as hectic as you imagine.

I shop with all four kids... They are great if I pick the time of day right