Traveling with a baby!!

Hi!!

For the next three months my husband is traveling for work and me and our baby (currently 3 months old) are going with him.

And I'm wondering if there are any mamas out there that have traveled and have any essentials that you recommend.

Just for reference, in august we are traveling to Boston by plane. In September, to Denver by car and in October, to New York by plane.

I appreciate any advice you have for us since this is our first time traveling with our baby.