http://mygoodacorn.blogspot.ca/ has links to the online guidebooks for Munson Lake (destination worthy, though still early in the development phase) and Cape Spencer (not worth the trip from PEI) as well as stories and updates on those and other locations.
There are some boulders scattered throughout Welsford, most established more than 10 years ago and seldom repeated so are overgrown and no guide exists. The Woodlot has great, unique rock, but doesn't get the local traffic it deserves, so tends to quickly get overgrown, as well. Even if it were pristine, though, there's not enough to justify a trip from the Island.
With a few stand alone exceptions, nothing solid has been found beyond these areas. But that doesn't necessarily mean that good rock doesn't exist. If you find anything, please share!