I have a 350K 85 300D in relatively good shape.

The engine, transmission, brakes, cooling and electrical systems are up to snuff as well as the shocks, struts and tire rods and ball joints.

I need to get to the Midwest from the East Coast and back and use the car for about 5 weeks there for work. If you were making such a trip, what would you be most concerned about? Obviously I i will be bringing tools, a jack, spare alternator and PS pump, fluids, etc, but what systems should I be worrying about?