Roadtrip with 3-4 week old

Hey y’all. So me and my sister are literally 1 week apart in pregnancy. The thing is I live in Arkansas and she lives in DC! About a month after we have our babies I want to drive up to meet her baby girl and visit with her. It’s about 15-16 hours. I was planning on making it there in two days. So I’d stop halfway in Knoxville, tn. So driving about 7-8 hours the first day, same amount the next. I would be alone. I’ve never done this long of a road trip by myself, let alone with a baby. Obviously I would have to stop a lot but I don’t mind. I will be breast feeding so that will make it much easier. I just want to start planning the trip now and getting what I need together before the baby comes. I already have all the money saved up. And I’m in the process of getting my car up to par. Just would love to hear some tips and tricks from everyone. 😄