From the deserts to the mountains, national park lodges in the Western U.S.’s iconic destinations are close to putting up a “No Vacancy” sign for summer, according to the Los Angeles Times.

For this you may point a finger at Ken Burns and his “National Parks: America’s Best Idea” series that ran last fall on PBS, or at the resurgence of domestic travel in the face of economic doldrums, but whatever the cause, the effect is the same: not much room at the places everybody loves to love.

Phantom Ranch, at the bottom of the Grand Canyon and accessible by foot or raft, probably is a nonstarter if you haven’t already secured a reservation. Reservations sell out within hours when they open up 13 months in advance. “They won’t get into Phantom Ranch unless they’re extremely lucky and call when someone cancels,” said Dave M. Hartvigsen, vice president of sales and marketing for Xanterra Parks & Resorts, the concessionaire.

Ditto for Sequoia’s hike-in Bear Paw High Sierra Camp. “It usually sells out when we first sell it,” said Sandra Levesque, director of reservations at Delaware North Cos. Parks & Resorts. And for this year that meant Jan. 2.