Although lodgings are difficult to get in the front-country during peak season in the most famous parks, it is no longer true that this has resulted in a decline in the condition of the parks. If you take a walk on a popular trail or go to see wildlife at Yellowstone, you are likely to see parks that are better cared for now than they were in 1972. At Yellowstone, if you know when and where to look, you can see every species of animal the park had in 1850.