I was in Yellowstone May 12th-18th 2012.Alot of Bear activity between Mammoth and Norris.Several really nice Grizzly bears.You could follow them from valley to valley up and down the road.They would hang pretty close to the road you could spend several hours with them.Weather was nice that week.I camped in Mammoth campground.Took a few hikes around Mammoth.In the Lamar valley alot of wolf activity missed out on some good opportunities was a little late on several chances for wolf photos.Was able to get some video on an elk kill.Good trip over all.