Ok, so that's a bit of a dramatic title, but I just had a thought.
Recently, I started a thread on animals called, well, "Animals!" I asked for some links to private environmental groups. After reading some articles on privatizing state parks and such I found myself squirming, a bit of statism fighting to reinvade my mind. I felt a familiar anger at the idea of not being able to visit a beautiful setting without paying a fee. Maybe even a steep one. And then it happened.
The best way to protect our good earth is to keep people away from it as much as possible. And since nobody washes a rental car (I viciously swiped that from an article), the best possible caretakers are naturally private owners of these lands. And since there would be campgrounds in a free market (there's a real demand for it), the more sensitive areas might be more restricted by price.
During my adventure through market anarchy, I've compared it to the sickening cliche of The Matrix (I'm a totally unashamed Matrix fan, own the trilogy and the Animatrix), but it still stands: humans tend to behave like parasites in certain circumstances. Not all the time, mind you, but often. The free market saves us from ourselves by allowing natural law to do its thing. By creating real money restrictions that access these places that help give us life in the first place, we are protecting them well beyond what the state can do.
It would reduce driving, and would naturally protect the very lands the state often leases to its friends to log, etcetera. Sadly, I know it makes people mad at the idea of having to pay money to gaze out at the grand canyon, but its money that will protect it long term, not government.
So, uh, yeah, basically I was sad and sleepy and then I was happy and awake, if that makes sense.