In reply to Rog Wilko:
Try to have enough time to have a good look around Okey Railway Station, which is where the trail leaves from. Its all done and open now, and it looks an absolute picture! Cafe is great.
The trip to it on the train from Exeter is silly cheap and so interesting. Not sure if you can take bikes on it, or need to prebook, but that would make a really good day out with the cycle to Lydford too?