As a first time mom, I am learning as I go. Navigating the mommy waters figuring out what works and what doesn't work. Understanding that, in a few years what worked today might not work then.
All in all, to say the least having a toy bag packed and updated in your car, I've found makes riding in the car with little one a bit more bearable. These travel bags work great for other usage as well, I say find the niche that works best for you and your family and run with it!
I hope this sparks ideas for other fellow moms on here or provide the reassurance that it is ok to be over prepared, welcome to the club!