We went to my folks who were 2.5hr away, when our girl was 8 weeks. She slept for the entire journey there and back. We were amazed. 2hrs is max travel time in the car seat. Take a sling, b&w cards, travel cot, sterilizer, spare clothes/lots of nappies /sleeping bag and sit in the back of someone else is driving. Good luck!
@Grace thank you!
@Jenna (Jen) very helpful, thank you so much!
A changing mat for the car or to cover the changing table in the bathroom, and clorox wipes for the changing table. I once saw someone change a baby on one bare butt and the kid sneezed and pooped all over it. Then she just wiped with a paper towel gave up and closed it. Now i sanitize before using.
I think the recommended time is every two hours!