E.P.
Responding to your feedback comment: the first long trip I did with my son, I started putting a list together a few weeks before we traveled. As I went through my days, I figured out what I used, what I needed to take, or find a travel version of. It was really useful and I update it each time (because their needs change as they get older and depending on exactly where you are going). it is too easy to forget some silly thing that you use at home and don't even think of as a 'baby' item.