Really quickly, because I'm just catching up. It is still safe and small, and cell service is like a miracle when it happens. My iphone gets 2 bars in one corner, and no one else gets any signal. If you see people pulled over, it's either to spot a moose or make a call in on of the few spots where you can.
We have had a home in North Stratford, NH for 12 years. That's below Colebrook, which Stewartstown and Stark can overlap with. The boundaries up there are fuzzy. It's all woods, rural, and even Colebrook with its riteaid and Dunkies (no McD's) isn't "big". It is safe, even in Lancaster, which has a McD's. There's nowhere to go. You can't just walk to meet someone, really. Our nearest neighbor (on Route 3, no less) is a quarter mile away. I wish I could show how limited the options for an 11 yo on foot would be. This is scary. My thoughts were that she would have had to met an older teen with a car, online, but she doesn't seem the type. Without transportation, I don't see how she could have gone far on her own.
There are tons of people up and down on the CT River, so LE will have many eyes. This, too, is a small community, over many acres and towns, but still small. I hope she gets home, safe and sound.