Expand the search area? I think they have been. I personally don’t think she is anywhere in that forest but if she is then I think she’s not far from where she started and she’s been missed due to the density. They need to retrace their tracks where she could have been covered by something and missed. She stopped for water and snack, she took a backpack, she had this backpack ready to go in front seat next to her. I think her intention was to go hiking. Without the backpack I don’y Think she went far. Perhaps she changed her mind and decided to go for a run instead but then I would suspect she’s not too far from where she started. Just don’t think with her experience she would be too far from the search zone without her backpack.