To do that kind of mileage each day i would imagine that you will need to use the interstates rather than the scenic roads, so I hope you like the nice scenery of billboards, trees, petrol stations, and even more billboards. Oh and the back of 18 wheelers !
I could think of plenty of other things i would rather spend five days doing in the US. Like sticking forks in my eyes ! LOL !
Graceland is worth the vist though, and if you have the time, the original Memphis Belle (the first B-17 bomber to complete a 25 bombing run tour of duty) is on display at Mud Island on the Missisippee River in Memphis.