I stopped in at Slide Mtn and Bisquit Brook trail heads today on my way back from Bellearye. Just like Belle, there is between 10" and 12" of consolidating snow over dirt or ice. Not much of a base at all. Of course, the higher elevations should have better snow cover, but once you lose that elevation, beware as there still is not much of base at all.
Dave's suggestion for Overlook could be the call as the route is a pretty uniform dirt road surface. He is also correct in that bare booters, sledders, trail runners and snow shoe folks will quickly ruin it for skiing.