It sounds like you've got it all figured out already, so I'll just add a point for reference. I made the drive from OKC to Disneyland almost 10 years ago now, solo. I left at about 5am, and hit a brick wall just over the California border the next morning at 2-4am. With another driver I may have been able to push through, but we would have been dead on our feet upon arrival. I did stop for a quick dinner in Flagstaff, and in hindsight it would have been about the ideal place to call it a night.
Sounds like you're on the right track! I actually quite enjoyed the drive and the scenery, past Texas.
Sounds like you're on the right track! I actually quite enjoyed the drive and the scenery, past Texas.