1:23 p.m. on August 10, 2008 (EDT)
Many years ago, the Sierra Club ran very large backcountry backpacks, often over 100 people. These were started by John Muir and the other founders of the Club with the idea of showing people the beauty of the Sierra (and later elsewhere), thus inspiring the public to want to preserve the parks. These "High Trips" continued into the 1970s, along with Base Camps, High Light trips, and others. When I was in high school, some of my friends and I would look at the schedule of High Trips, then go on the route 2 or 3 days behind the trip and collect gear that had been left behind. Most of it we handed over to the rangers (NPS or USFS, depending on where we picked it up. Since it was rarely claimed, after a month or so, we would go through the piles and equip ourselves for the next year or so. The rangers often provided burros so we could bring more gear out (1 or 2 rangers would accompany us). Other huge impacts included washing and swimming in the lakes and streams, latrines that were dug for the group (along the trail, the rule was ladies to the right and gents to the left of the trail), and the obvious impact of 100 people plus the packers and the mules.
By the 1960s and 1970s, the Club realized that the impact was unacceptable and discontinued such trips. They still run trips, but limit the numbers of participants and of trips, spreading them around to more areas of the world to reduce the impact.
Recall also that the Club published (and still publishes) "coffee table" books with magnificent photos by Ansel Adams, Elliot Porter, Galen Rowell, and other outdoor photographers, with the purpose of showing the wonders of the world and hopefully inspiring people to preserve these places. It indeed does this, but it also inspires people to go in droves to the Galapagos.
So it is a Catch 22 - people need to understand the value of such places and to be inspired to preserve the Earth. Yet, at the same time, they are inspired to visit them. It is desirable for even the most handicapped and underprivileged to have the enjoyment of such places, yet facilities to accommodate them have a huge impact. It isn't just the individual "special places" that are included in National Parks, National Forests, officially designated Wilderness Areas, and the state and local equivalents. It is also that seeing and appreciating these places helps provide a perspective on the whole planet and the whole interactive web of life, the oceans, the atmosphere, and the rocks and dirt of the continents.
So there is a tradeoff - provide access and thus education (good idea!), which causes significant impacts (bad idea!).
I have been a Sierra Club member all my adult life, along with contributing time, personal energy, and a tiny amount of financial contribution to several conservation organizations. So I get to see up close and personal the tradeoff as it happens - chop down trees to make the paper to print the books and mailings to educate people, take them into the outdoors to show them in large gas-burning vehicles (planes, trains, boats, as well as cars), have a dinner with a slide show/movie/talk for education and consume fuel to cook the meal, water to clean up, trash that is generated, etc etc etc.
Unfortunately, there is no simple answer (well, yes, there is - wipe out 90 percent of the population through some means, but most people would consider that solution unacceptable). If there are people, there is an impact. Even the "noble primitive, living in harmony with Nature" has had major impacts. Here in the SFBay Area, for example, the Ohlone and other Native American peoples use to deliberately set fires to create and clear meadows, which would attract deer and other game, thus improving the hunting. Landfills have existed since humans began living in groups (anthropologists and archaeologists love poking through middens to study the leavings, thus learning about these early humans).
I share the frustration at the uncaring and the ignorant for despoiling "MY Wilderness", but I also realize that despite a lifetime traveling and living in the wild for sometimes a month or two at a time (some of it "living off the land"), I am still learning things about my personal impact (in other words, even as a card-carrying "elderly", I am still IGNORANT and careless, and do dumb things that have high impact - not the least of which is replacing my house). Sometimes, I am just as elitist (maybe more so) than MTB and Tipi have expressed above (see, I am holier than anybody else, even walking 10 cm above the water to avoid contaminating it with my dirty boots). But like trouthunter, I get reminded too often about my own impacts when I see the impacts of the Unwashed, grit my teeth, pick up some of their (and my) trash, and strive to educate others by example and trying to reduce my footprint.
It isn't "there but for the grace of God go I". It is "well, that's me, too, hopefully though on a smaller scale."