The idea was brought up
in this thread. So what do you think of it? Could The Grand Canyon use a roller coaster or two to bring in more people? What if it would make way more money for the owners to just throw a dam across Yosemite Valley? And those Giant Sequoia, surely they are worth a bundle for their lumber.
I'm just not sure I think that selling off our National Parks to commercial interests is wise. Maybe the most popular ones could be kept in decent condition on account that they are already so visited (though I doubt programs like the Yellowstone Wolf reintroduction would continue). Though they'll become much more expensive to visit.
But what of the smaller National Parks? Would they just become housing developments or some other type of new use?