Traveling cross country with newborn.

My LO will be about a week and a half old my husband and I are moving from NC to CA driving the whole way with my mom and step dad. Has anyone done this before baby sleeps good in the car seat but I'm worried about bottle feeding too early because my mom doesn't want to have to stop every 3 hours or less because we are trying to make it to colorado on or before x mas <a href="">eve</a> to surprise our family that's there any tips? She is exclusively breast fed right now but I do have a Nipples shield do you think introducing a bottle for the car ride will be okay or do you think she will get Nipple confusion?