You did? Good job! Music is 100% required.
Hummm getting carsick is a bit of an issue with reading. I know there are tablets you can get to stop that happening but unless you have a really good book you want to read it might not be worth the bother.
See if you can take you charger and if you can use it then you can watch all the movies you want without worry! Plus if it doesn't work out you haven't lost anything.
You wouldn't need to write like 24/7 XD You can stop when you start to feel sick and take a break!
Bus trips get prettyyyyy boring especially if you don't have people to talk to so I'd definitely recommend sleeping or at least taking a comfy neck pillow thing.
Hahaha jazz hands XD
