WVBoy,
You might be better off trying Magog or Willoughby. I've never heard of anybody targeting burbot on Champlain. Not that people don't, but I just have never heard of it. I'll ask around and see what I come up with.
Most folks I know target them at night with dead suckers right on the bottom. I'm not sure if they relate to structure of just roam the bottom looking for food. I believe they tend to be in the same places as lakers, so if you set up for lakers in a spot, you might want to stay a couple hours after dark and see what happens.