It’s nice to have a good map onboard, like the Rand Mcnally Road Atlas  or The Deluxe Motor Carrier’s Road Atlas, which is available online but I think can be found cheaper than Amazon at your local Truck Stop like Pilot or Flying J

If you’re not the smartphone or tablet App type person, it will be good to have a campground guide like the 2013 Good Sam RV Travel Guide and Campground Directory which seems be supplementing the established Woodall’s guide.