I did a 600km ride yesterday. A very winding way north of Napanee. Rode some Westport back roads, on to Perth, Smith Falls, back down through Kingston, and then the Loyalist Highway, across the Glenora ferry, through Prince Edward County, and back to Newcastle.
Overall, I thought the roads were in excellent shape, FOR MARCH. Some spots were quite clean, but other spots were terrible. I certainly wouldn't recommend ripping through some of those twisties. (especially Westport back roads)
As always, exercise caution, and show some restraint.
Even in the summer, I prefer not to go too fast unless I KNOW the road. (as in I rode that same stretch earlier that day)
I remember going north up the 507, (the road was clean), turning around and coming back down south. In that time, someone had turned off the 507, onto one of those gravel roads, spinning their tires, and spraying gravel all over the road.
I guess what I'm saying is, you never know for sure.