We're leaving from Fort Wayne and doing something very similar. We're leaving early the morning of 10/23, stopping just south of Atlanta for the first night (approx 13 hours). Then 10/24 we're driving about 5 hours to Bradenton Florida (Gulf Side, near Tampa) and spending the day/night with a friend of mine and her family on Anna Maria Island. Then we're driving to Orlando (a little less than 2 hours) on 10/25. The whole trip (including the side trip to the beach), if I recall correctly, was around 18 hours or so.