The second part of the loop, 6-16, starts in the woods on the far side of Tewin. You can park between the village green and the little shop and carefully walk along the lane to the open field. Once there it is footpaths all the way.
For all caches you will need your own pencil and in some cases a pair tweezers. There is absolutely no reason to go down into the little gully even if as usual its dry.