I agree with MissL, everything we said was 5 hours is probably 6+ hours.
I strongly recommend making this trip not about Harrah's, but about the USA travel experience. I already mentioned the New Orleans food {fried oyster po'boy?}.
Also:
If you go to Council Bluffs, Iowa, also go to the Iowa State Fair, 2 hrs 15 min away in Des Moines, Aug 9-19. Wonderful drive through countryside, corn and soybeans in varying shades of green (better than a Grant Wood painting). Beautiful landscapes. Pork chops on a stick! Highly recommended (And I am from the "other" state fair state, Texas!).
These things are far more important to me than Harrah's comps. You can have both. Graceland, anyone?
- bcc