The National Park Service has webcams stations all over the country, with live feeds. I can see both sides of installing some webcams not IN the shelters, but say on top overlooking the front area of a shelter. It would give people a live perspective of the area, and could help in trip planning.. Im thinking more so in winter. These little types of cameras can be run off of solar power, and maybe shelters aren't the right place for them, maybe at iconic spots along the way.. Fontana, Snowbird, Washington Monument, Harpers Ferry. Of course vandalism, maintenance, repairs and solar contact would all be discussed lol