I was under the impression that the are was closed to sledding haven't been in there for 6 years!, if its not closed I'd love to head back in there again!
If going in on the Cotton which is the legal way in, it is plowed to about 19 km I think, so you will be parking there, be sure you leave room for trucks to get by as the they are going to the dam projectSouth Dore Road has been closed about 4 years but the other route in is open and yes about half is closed for caribou even though I have not seen a track in there since 2002. Just don't go past the lake.
Well Thursday could be your day if you're not working. Or Fri or Sat. Ha ha