I came across these images on Flak and I couldn't believe how good they are. They are from a recently published book by Shelly Lee Adams called Salt and Truth, you can find a small section of them here http://flakphoto.com They have a fantastically still quality about them it's almost like they have forgotten there picture faces and relaxed into being themselves. I think they are taken with a 5x4 camera, but I can't be sure.
Either way and which ever way they are taken there really worth a look