She must have been curious about the box on the tree and wanted a closer look.
Here's what the field looks like in the daytime. I don't know what set the camera off - I can't see anything in the picture. I think I'm going to leave the cam here for a while. I imagine there will be some more deer passing through eventually.
I've given up worrying about what that hole in the ground was. Probably not a fox. No tracks around it. It would make sense that a ground hog lives in there and he or she is hibernating now.