Hi Cat,
Suggestions for when you follow the link FW posted above,
If it's a set of directions you're after, Mr Goffik provides some detailed ones to a smart looking concentric pair of circles here
http://www.themodernantiquarian.com/site/1299
If it's some where easy to get to from the road, Merrivale is convenient.
http://www.themodernantiquarian.com/site/18
And rather smart too.
For hut circles, Grimspound
http://www.themodernantiquarian.com/site/16
Is a well defined settlement, fairly close to the road.
That's all I know
Ooh! And have you tweaked the plugins on your user profile to give a quick link to the multimap, landranger and whathaveyou?
Happy Dartmooring