J. Scott Donahue

That's like asking, "Who is your favorite child?"

Some seasons, planning a trip to Yellowstone can be a breeze. But in summer, you may need to reserve a year in advance.

What do I do if bison are blocking the road? Is it safe to drive into the herd? 

Yellowstone draws in nearly five million visitors in a year—most of them eager to see Old Faithful. The busiest months are June through September.

Death from encountering a bear is rare, but they will attack whatever they see as a threat to their cubs, or if you startle them.

During the summer season, cars are the best option for taking a trip around Yellowstone unless you are riding with a bus tour or concessionaire that provides transportation. The Grand Loop takes between 4 to 7 hours to drive in full.