Wolves in Yellowstone

After that class discussion on the oversized elk herd in yellowstone, I started to wonder why it would be that the NPS would want to discourage variables that would keep the population down. The main thing that I thought of was the idea that more predators in the park might detract from tourism, the real reason there is a park in the first place. I specificallt looked at the reintroduction of wolves into the park. I think that I must have been wrong though, all I found were things articles that prasied the wolves, even for their value to the tourism industry. Here's one link that I found.