Not that I want to put you off visiting Dewerstone, but Hunt* mentions that the Dewerstone valley below is a favourite midnight meeting place for the headless spectral Wish Hounds. He calls them “the wish or wisked hounds of Dartmoor,” also the “yell-hounds,” and the “yeth-hounds.”
Pure Joy mentions that rock climbers have died here – perhaps many people have made fatal errors over the years, because it is said the hounds lure unwary (or inquisitive) travellers over the edge to their deaths.
*Popular Romances of the West of England, 1865.
(Btw, the Magic record considers the enclosures themselves to be Neolithic, with the hut circles later Bronze Age additions.)