The Caribou Valley Road is now gated one half mile from the Appalachian Trail crossing. The metal grate bridge just beyond it has decayed enough that the owners of the road have decided to bar entry beyond it although be aware that at least one wooden bridge on the way in was looking pretty rough as well. Still passable as of this writing but as Nartreb said, check the bridges on foot BEFORE crossing them, particularly if it has been some time since I wrote this comment. There is a parking area off to the side just before the gate sufficient for four vehicles at least, with enough space to park on the road in many places. Someone installed a board bridge at the stream crossing, which makes the initial water crossing much easier.
Thanks, I've updated the page.