There really are not easy solutions to the problems of the parks usage and budget needs. If none of the thousands who visited Yellowstone went to the national parks, there would be even less of an inclination for government to do anything about it. And even less funds to maintain them. If there are not a few rangers around, there will be more "cutting across switchbacks" and other things that are done now, but hopefully kept in check by those who watch over them. There are a lot of deer taken out of season by those whose land they are on, butchered quickly, and the meat frozen and stored. If there were no Game Wardens, imagine how quickly the populations of hunted animals would be destroyed. I think the issue is far less about the costs, and far more about the future use of the money, the care of the parks, and need for those parks and lands to be wisely used.