
Originally Posted by
Midwest Michael
Honestly, based on that statement, I think do you have some reason to be scared. The grand Canyon to Amarillo (my best guess for what you mean by TX) is nearly 700 miles. Amarillo to Memphis is 725 miles - and that's the western most point in Tennessee! Both of those drives are way too far for a single day, especially when traveling with kids. They aren't anywhere close to 10 hour days either, in real world travel conditions (not the fantasy times provided by online maps) you're looking at a minimum of 13-14 hours each of those days.
As the above posters indicated, you need to rethink your plans a bit with the goal of traveling about 500 miles a day. That means you're going to need more time than you've currently planned, but that extra time really is essential to having a trip that is both safe and enjoyable.