I drive from Central Florida to western NC often pulling a 37' 5th wheel. Time Atlanta between 10AM and 2PM or before 6AM in the morning and unless someone did something stupid you will have no problems. Do not take the bypass. I found it to be more harrowing than right thru downtown. All the 18 wheelers go that route.
I also jump into the HOV lane since there are usually at least 2 of us in the TV.
2016 Siverback 33IK
2015 Ford F-250 Lariat 6.7L V8 Diesel 4WD Super Cab
"If you don't know where you are going, any road will get you there."