Having driven my M35A2 from Baton Rouge, LA to Louisville, KY about two years ago I would like to make a couple of suggestions. Hearing protection and a way for hands free cell usage as many states will pull you over for having a cell phone to your ear as they will for having it in your hand for using as a GPS.
The most important things are making sure you have good brakes in the way of wheel cylinders, good clean, fresh DOT 5 in the lines, and fresh grease in those hub bearings. I had a wheel cylinder stick driving on the interstate and it is no fun when you have to work in an isolated area of a truck stop parking lot.
Of course my up-side was the previous owner had put MRAP tires and wheels on so I maintained 63 MPH most of the time.
I highly recommend a fuel lubricant as well and you will need to use 100% diesel in the mountains in order to get the most BTUs for power.
I can not stress enough about having a base line on bearings and wheel cylinders. If they stick it is a nightmare come true as a minimum.
I am still in Louisville so please PM me for my contact information if you choose I-64 for part of your journey.
This will be a trip you will remember for the rest of your days and as others said, pictures, pictures, pictures.
jimm1009 here on s.s.
or
m1009jim@yahoo.com