Tavistock and Dartmoor provide a pretty spooky backdrop to all things Halloween and there is plenty going on to keep the brood entertained this October half term. Whether you all enjoy the thrill of being frightened or are looking for something a little more easy going, here are our top picks… TAVISTOCK HALLOWEEN TRAIL . Our annual spooktacular adventure is back. The ghost of Lady Mary Howard rides a gruesome carriage of bones from Tavistock to Okehampton Castle and back every night in search of a blade of grass.…