Whether it's a campsite, cabin, or hotel, national parks across the country offer a wide range of accommodations for visitors.
And according to Haraden, many of the accommodations are reasonably priced. For instance, a room at the Lake Crescent Lodge in Olympic National Park in Washington starts at $108, according to the lodge's website.
"Everyone thinks they're more expensive than lodging outside of the park, but that's not necessarily true," he said. "The park service wants to make them available to everybody, but you do have to reserve them way in advance."
For example, during peak season, The Ahwahnee Hotel in Yosemite can fill up months and even years in advance, Haraden said. It's one of the National Park Service's more expensive hotels, with rooms starting at $518, according to the hotel's website.