And....if she left on her own, how?
Her vehicles are there. I'm sure her credit card and bank accounts have been checked for activity. Bus stations, train stations, and airports have likely been checked.
If she left town, I don't think she did it on her own. Seems like if she left, it was in someone else's vehicle or someone else was driving her car.
If she harmed herself, she's likely nearby, somewhere she could travel to on foot. I haven't heard that LE has searched the area, but I guess they probably did - that would be SOP, I would think. No sign of her purse being found.
And, then there is ping in Idaho which makes me think she is NOT at a nearby location she traveled to on foot.
So...I think she is not nearby, did not leave home on foot, and was with someone else either willingly or not.
jmo