Memorial Day has come and gone, and the great American travel season is here. During the summer, most Americans take at least one extended vacation, and four fifths take that trip by automobile. Unfortunately, this year, the price of gas is near record highs, and no one likes to spend their vacation money on gasoline. While there is little to be done about the price of gas itself, there are some things the average vacationer can do to help ease the costs of auto travel.Tune up the car. Makin.