Nice practice track for a tenner. Ride as and when you want. Opens from 11am - weather permitting.
From your place I'd head down A38 to Plympton's "Deep Lane" exit. Left at top of slip road. Follow road all the way to T junction and hang another left. After about 3/4 of a mile you'll drop down a big dip and up the other side. On the way up there's a turning on your right - take that - a small country lane. Go about 300 meters up here and Dickies field is through a gate on your right.
Always worth a call to see if he's open - 07816 271454