Help with Yellowstone and Tetons

We stayed in Madison Campground which is centrally located in the park. As other have said,Yellowstone i big.About as big as the state of Rhode Island. I would suggest having dinner at the Old Faithful Inn and visit the Grand Canyon of the Yellowstone. We saw a grizzly with 3 cubs on our way from Norris to Canyon. At Canyon, there was a large raven who sat right outside the store. I got my wife and I some soup and hot dogs. The raven followed me back to the van and sat close by. We had a black Lab. When I opened the side door of the van, the dog and the raven eyed each other up but they were both more interested in the food.