In 1984, Clark Griswold and his wife, Ellen, set off with their kids, Rusty and Audrey, on a 2,400 cross-country trip from their home in the Chicago ‘burbs to “Walley World” in California. If you’re thinking about making a road trip of similar distance, whether cross-country or down the East Coast, it pays to consider the costs (and prepare for any potential trouble) you’ll encounter along the way. Fuel Economy and the Cost of Gas As beloved as that brand-new Wagon Queen Family Truckster was, let’s assume you’re driving something a little less Partridge family. We’ll use a 2012 Honda...