We went to Yellowstone in 1995, just after the wolves were reintroduced, and were lucky enough to see one. The officials there tried to convince us it was a coyote, but this was definitely bigger than coyote sized.
In 1995 you could still see evidence of the fires of '88, but even more fascinating was the new growth. Some of the trees there have pinecones and seed pods that will only open in the heat of a wildfire. Fascinating stuff!