I'm curious too. It looks like a red fox. A gray fox if I recall correctly usually has a black stripe along the top of it's back and tail. It's so hard to tell with night pictures.
I just looked them up and this is what I found. Grey foxes have a black tipped tail and a black stripe down its back. They have a more cat-like face. Red foxes have black on their legs, black-tipped ears (seen on the backsides), a white-tipped tail and a more dog-like face. I couldn't tell on tail either but the black legs are there. I had some cameras go off last night but nothing in the pictures. Maybe a bug set them off.