I know Dartmoor lower grade crags and bouldering pretty well and very happy to show people round, possibly both days. Would suit me although would love to finally do Moonraker…
Paul and Andy mentioned a couple of spots: as Andy says, Sheepstor is a good little venue, very compact area, and is near Dewerstone. It’s not big enough for of people, so if there’s already a group there (it does get used by top roping groups) its often best to move on or it gets like The Castle… it’s grit-esque in length and a bit similar feel, can be a bit fierce but is all good, gear is ok, think you can set up top ropes, but better to second. Mushroom Wall is a good VS…Wind Wall is good HVS
Dewerstone is very good, and shadier in the woods, nice and long for the Moor, multipitch, but fairly friendly ones, bigger venue. Colonel’s Arete, Central Groove, Leviathan, Climbers Club Direct… Beware the squirrels, they chew through rucksacks to get food. Definitely worth it, but bit of a maze and hard to find your way around (may be better topos nowadays), alot of stuff be overgrown, haven’t been there in years!
A touch further up towards Bovey is the idyllic ‘Golden Triangle’ which hosts the cream (tea) of moorland climbing, it’s probably not that much further once on the A38 from Titty McVitty camping… Hound Tor is excellent, some great climbs, Liars’ Dice (S) is good, Suspension Flake is a classic and very ‘doable’ (VS) although maybe overhyped. Harder stuff abounds, Aerobic Wall is nails, Anaerobic Wall is nailser, Sharks Fin is fun if the crystal hasn’t snapped off yet… lots of bouldery climbs, often very short but technical, or straight up bouldering, a maze of a place. Excellent burger van: The Hound of the Basketmeals
Hay Tor is also very good, excellent venue and a popular tourist spot (as is Hound Tor) quite a lot there, beautiful setting overlooking the moor and vale. Lots of proper climbing split between Hay Tor, mostly single pitch (Vandal and Ann is good, Letterbox Wall is tricksy), and Low Man (longer, mostly multipitch), Outward Bound, Aviation (not done that).
And scattered around the area are lots of bouldering/highball venues, Bonehill being maybe the best, but lots of scattered, well documented boulders all over, great for a wander.