I'd just pack some bulbs, some Dot4, some blue antifreeze, and some jumper cables...maybe air up the spare and check your lug nuts. Couple of mini hose clamps and a nut driver?
Better time is spent guessing your stops to look for an interesting lunch or midnight crash spot. You'll be driving tanks at a time, so 360 miles or so and you'll need a gas and go or a gas and nap. Some times a 30 minute snooze is good for 4 more hours of cruising. Do you have a navigator or are you solo?
Keep treating the truckers nice and you may get a good tail light tow in the rough hours.
I love road trips