Did some hardcore looking at the map today. Here are my thoughts:
7:00 - on the road Ocala, drive to Cordele, GA (215 miles, 3hrs, 15 minutes) 10:15EST - refuel
10:45 - on the road Cordele, drive to Calhoun, GA (210 miles, 3hrs, 30 minutes) 2:15EST - refuel
2:45 - on the road in Calhoun, drive to Sparta, TN (135 miles, 2hrs, 30 minutes) arrival by 4:15 CST
This will get us through Atlanta by 2:00EST and Chattanooga by 4:00 EST which is important, and in Sparta with time to relax and set up with daylight.
Just sayin'