I have never in my life been subjected to more politically correct and outright government centered PROPAGANDA as I have when taking guided tours in National Parks. I swear that the Rangers must be almost as brainwashed as the #OWS kooks. Just MHO.
After visiting there, I would tell any tour guide to STFU. If ever there was a place so beautiful it defied description, it was Yosemite. I went there to make photos in the manner of Ansel Adams. It is hard NOT to take a good photo there-— morning noon and night.
Much of the National Park Service is staffed (infiltrated?) by leftist, anti-American, enviro-commie types. These people naturally gravitate to the Park Service. They think they're doing a service for Gaia. I've encountered many of them.