Pulled up the map to work out distances as one of my favourite campsites is NR Fowey.
Google maps couldn't find Dandy Hole.
Yahoo maps ditto.
All I could find with Dandy in the title was Dandy Hill NR port Erin I.O.M.
Next tried the big guns, OS Maps British Gazetteer: 9 occurrences of Dandy in the name.
Only one village, all the others are features and no Dandy Hole.
Dandy Corner (Village) is in Suffolk NR Cotton.
Now if I remember your posts. Your an old sea dog (figuratively) so may well know points round Plymouth.
I eagerly await my correction.