I guess you don't know what happens at the Border with Mexico
If you had the proper Mex Insur & Permits to drive a truck & trailer down to northeastern Mexican state of Coahuila & then to Saltillo.
You would have to have official paperwork from Ram Headquarters that tells the Railroad & the Assembly Plant that allows you to release it to you.
Now you are on the Mexican Highway, you have a couple things to watch out for
1) would be a pedestrian that is hiding in a ditch, waiting on your approach & then jumping out in front of you & purposely getting hit, they now own your tow vehicle, trailer, & new truck an you are going to a Mexican Prison until the American Consulate & a very good lawyer get you out of Mexico.
Forget about your property, be glad that your not in Mexico, by the way, the Federales give the Mexican family your address & you better start carrying, because they are after you & your family & any property they can get their hands on.
2) besides the person in the ditch,
There is the Mexican Mafia, they watch you & likely when you Stop for snack, you will lose everything, maybe your life.
The Freight Trains that haul the vehicles are enclosed for a reason, a Flat Bed railroad car hauling vehicles, would be stripped.
It is just best to grab your skies and polish, then be patient
There is no better answer
Oh, i forgot, every official that you see south of the Border has their hands out, it is called Mordida
Mordida definition, a bribe or kickback.