Unfortunately I didn't record this walk on my Garmin-I forgot to start it!!
I never actually followed the trail completely, this time we scrambled up into the woods on the north side of the valley from the storage (top) pond. There was no defined path but we managed to find a way through the undergrowth.
The trail through the valley is really straightforward.
We then returned through the woods via Barbadoes Hill
For a longer walk of about 7.5miles I have started at the Fedw Wood car park ST 50583 98424 and walked to Tintern for coffee then headed back uphill. I do have a GPS trace for this one, PM me if you'd like it.