How will I find planning for and visiting Glacier different from Yellowstone? For example, Yellowstone lodging reservations has a toll-free #,Glacier doesn't. And lodging reservations are best made a year in advance in Yellowstone. Do you have to plan that far ahead in Glacier? And are the summer crowds as heavy in Glacier? And are you better off staying overnite in a couple different areas to see the whole park? And will we see as much wildlife? What can you tell me about comparing the 2 parks?