Being proudly employed by the NPS I have to take a moment to reply. Our Mission states: "The National Park Service preserves unimpaired the natural and cultural resources and values of the National Park System for the enjoyment, education, and inspiration of this and future generations." Please keep in mind that these are your Parks, and you are all lucky enough to be in a country that had the forethought to set these wonderful plots of land aside for YOU! Your children and your children's children! The NPS is in the midst of wrapping up its centennial year, and with it a record breaking year of visitation - Thank You!
So, yeah, we are loving our parks to death. Although, I don't really think it is that bad, as I believe strongly that our people will work towards creative solutions so that our parks will last another 100 years!
It will take all of us cooperating, and I won't say that it will be easy. Heck there may even be challenges and expected change along the way. It wasn't that long ago that we actually allowed the feeding of wildlife (yes, even bear) in our parks. The days of throwing the kids in the car for a spur of the moment camping trip, may now require a bit more pre-trip planning? With rec.gov camping reservations, the internet, smart phones, and now self-driving cars, I think one should expect some change.
All I hope for, is that we are all able to continue to experience our urban, county, and state parks, and every unit (currently 413 units covering in excess of 84 million acres) of the National Park Service!