The walk from the bus stop nearest Hogsmeade was a long and freezing journey. Hermione didn't want to risk being spotted by anyone she knew on the way to the village so she kept mostly off the beaten paths. With several inches of snow laying on the ground, she was chilled through before she'd gotten very far. Spending all night on an uncomfortable bus and thus being physically exhausted to begin with certainly wasn't helping matters. As soon as she made the decision to return to her home, she headed straight for a station to purchase a ticket. Perhaps she was foolish, but she didn't want anyone else to be killed because of her. So much for her plans to place her survival above everything else.