In this photograph taken on Saturday, May 21, 2011, in Yellowstone National Park, Mont., tourists photograph Old Faithful erupting on schedule late in the afternoon. As the summer travel season kicks ... more 
In this photograph taken on Saturday, May 21, 2011, in Yellowstone National Park, Mont., tourists photograph Old Faithful erupting on schedule late in the afternoon. As the summer travel season kicks off this Memorial Day weekend, many people may take one look at the price of an airplane ticket or a gallon of gas and decide to put off their dream vacation for one closer to home and closer to nature. less 
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Associated Press | Photo By Julie Jacobson
Sat, May 28, 2011 8:15 AM EDT