In reply to Fantastical:
Sorry for the late reply, hope it's still useful!
Weather hasn't been great recently, so naturally there will be wet rock everywhere, though Dartmoor granite does seem to dry quickly. A few hours of wind and sun can be enough to dry some stuff, and a day of good weather should be enough to dry most things.
As for where to go, it depends on how low grade and if you're willing to make a bit of a trek!
My favourite area on Dartmoor for a chilled-out day is Cuckoo Rock / Down Tor. These two can easily be combined in a long day out, with the latter offering lots and lots of VB - V2s, and the former offering a good circuit of sub V5 problems. Cuckoo rock is about 20 mins walk but is in a beautiful location, whereas the closest problems at Down Tor are around 5 mins from the car park, but the views aren't as nice :P Not much trad here though unfortunately.
If you're not up for going there, then the other obvious choice would be Hound Tor. Lots of classy easier problems, mainly up to V5, along with lots of easy trad. 5 mins walk from the car park. Smallacombe, on the other side of Hound Tor, has a nicer, more remote feel, and also offers a good circuit of easier bouldering. No trad though and is a 20 min walk-in.
Hope that helps
