Hello from your neighbor to the north!
I'd run down I-65 to Nashville, then I-24 to Chattanooga, then I-75 to WDW. I would avoid I-40 west out of Nashville as I personally think it is a harder mountain crossing than I-24.
There are a few hills with one long 4-6% grade going over Monteagle Mountain about 40 miles northwest of Chattanooga on I-24 and a bunch of sharp 45 mph curves through "Ridge Cut" in town as you follow the river. With your combo you should be fine. Just remember to downshift when doing down the hills rather than breaking. Don't want to burn up your breaks.
Also be careful around Atlanta. Makes Chicago traffic look easy. Make sure you don't hit it during rush hour. Better to wait it out. The rest is fine.
I've made the run from Chicago to Atlanta with a 80,000 lbs semi many times. Be smart, follow the speed limits, don't ride your breaks, and you'll be fine.
We are heading to Chattanooga this June for a vacation. It's a cool town if you need a stop over. Lots to see.
Have a great trip!
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Scott, DW, and Identical Twin DS (12)
2022 Chevrolet Silverado 1500 LTZ Crew Cab 3.0L Duramax 4WD
2019 Jayco Jay Flight SLX 298BH
2013 Jayco Jay 1206 (Sold)
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