We stopped just south of Atlanta in McDonough, Georgia (about 12 hours). There was a really nice Comfort Inn. We were at our hotel at WDW by 4:00 the next afternoon.
We hit alot more construction on the way home than on the way down, especially in Indiana on I-65 (July 24).
We're planning on driving down again next summer.
If you have any kids, the TV/VCR for the car was wonderful.