The biggest thing to note on this is the one way part of the loop to and from the shelter. Once at the shelter it was not clear to us to retrace our steps, so we ended up another mile out at a family cemetery (certainly worth visiting) but that put us off our timing and we lost out on completing the loop. So remember when you leave the loop for the shelter (a good place for lunch) that you will retrace your steps to get back to the loop to continue.