Just so everyone is aware, the A466 (road from Chestow to Tintern) is shut between the forestry car park and Wyndcliff Quarry.
When approaching from Chepstow ignore the road closure signs and park either at the forestry car park or just past the first set of cones but before the closure on the main road. If you are accessing the quarry you can walk through the closure section (manned during the day and unmanned at night).
When approaching from Tintern you can park on the main road near the quarry. For the main cliff again walk through the closed section and back to the forestry car park.