Auto travel is an integral part of the travel industry with the vast majority, 79 percent, of U.S. domestic person-trips being taken by car, truck, camper/RV or rental car. It's a growing market, increasing 11 percent since 1994. But the impact of auto travel was really evident following the events of Sept. 11, 2001, with the share of auto person-trips increasing 2 percentage points in just one year. Auto travelers tend to stay closer-to-home, most often taking trips of just one or two nights and the majority of travelers tend to stay in a hotel. Older Americans are big fans of RV travel, with more than half of such trips being taken by those 55 or older. The ability to drive around in your lodging means that RV travelers tend to take longer trips than average, many of them lasting a week or more. 

Source: Travel Industry Association of America