The stress of planning a family vacation this year is being felt by 89% of Americans, according to a recent study from Mastercard. And the biggest stressor? Choosing a destination, especially one that can provide fun and unique experiences for all. But TheStreet's Lauren Lyons Cole has the solution: heading to a national park for some outdoorsy and affordable family fun. Think beyond Yellow Stone and Yosemite: Recreation.gov and National Geographic's national park app can help you locate parks that are most convenient for your agenda. And even though this trip is going to be cheaper than gallivanting around Europe, make sure you make note of her budgeting pro-tips and wallet-conscious apps to stay safe and solvent along your trails.