N.K.
Congrats on your new little one.
Travelling with a little baby is so much easier than when they get bigger so enjoy.
The best tip anyone ever gave me was to take four big ziplock freezer bags and pack each one with a diaper a few wipes in a a mini-ziplock, a bib, a diaper cloth, change of clothes (a Onesie or sleeper suit) and a clean bottle and formula or skip that part if breast feeding. Then each hour or two you just have pull out a bag from the big bag and grab what you need. I found this so much easier when I need to change my sons diaper or feed him. Do pack more than you think you will need as you might get stuck or delayed and have a hard time without things you need.
Also, don't be afraid to ask for help with boarding and getting off the plane. If your husband is travelling with you it will be much easier. He can be the sherpa and carry everything and then you just have to look after your little one.
Also, check out a website called www.babiesaway.com. They rent all sorts of baby supplies and are near every major city. Their prices are reasonable and you can probably get the same co-sleeper you have at home and not have to drag yours across the country. I would bring your own sheet and an extra waterproof pad though in your suitcase just to be extra safe.
Also, VERY IMPORTANT, wash your hands constantly and bring handiwipes in the red pack that say kills 99T% of germs for the plane. So many people get sick from being on planes and you do not want to get sick or have your little one sick on a trip. I would ever consider wiping down the arms of your seats and the tray tables. I am not a germ phobe but having a sick baby is hard when you are home in your own house it is terrible when you are travelling. Think clean, clean clean!
Hope this is helpful and happy travels,
N.