Just a suggestion....Hope by "towing behind" you mean putting on a trailer, because you're taking a big gamble flat towing an unknown condition vehicle nearly 500 miles. The overwhelming majority of the cucv's I've seen come from GL have 10+ year old severely dry rotted tires and bad wheel bearings aren't uncommon. I would strongly discourage flat towing, but if you must, at least bring four spare wheels with decent tires and swap the wheels out for the trip home. Also bring tools to drop the rear driveshaft because it's more than likely bent, and you don't want to flat tow a truck with a bent rear driveshaft. If you can find a dummy slip yoke to slip on the 205's tailshaft so it doesn't make a mess, bring that too. If not, just put a bag over it and duct tape the **** out of it.
Where I75&20 meet is not a good area to be broken down. I work in west end ATL and there are some rough areas. I'll be working in SC when you're going through, so unfortunately I can't offer any assistance. Best I can help is to warn you to try to plan your trip so that you go through ATL after 9pm or before 6am - you'll avoid a LOT of traffic.
*Technically* if you are flat towing an M1031 on public highways in AL, SC, or GA, you're breaking the law. A "Dinghy towed" vehicle is considered a trailer by DOT, so it needs to either be under the legal weight limit or have a supplementary braking system installed. (They make them for the RV market). The weight break for trailer brakes is 3000 lbs in Alabama and South Carolina, 1500 lbs in Georgia. An M1031 is well over all three states weight restrictions, so if you have an accident while flat towing, be warned- you will most likely be ticketed at fault and insurance isn't going to cover any damages.