I noticed a couple of folks complained about the "animal jams" in the Park. While Yellowstone itself is spectacular, the animals are very intriguing as well. If it is so important that a person "scream" through the park and not take the time to look at as many of the features, including animals, why do they even go to Yellowstone? I have never been in a two hour "animal jam" but in plenty of 15-30 minutes one and I wouldn't trade one of them for the ability to get through the Park as fast as possible. Go to the Park and enjoy all that it has to offer, which is a lot.