ACG - You seem to know the area a bit, been to Big Elk Lake or Erickson Lake? How about Anchor Lake?? Been up through the Notch??
I have been into big elk and erickson basins quite a few times during the summer for camping and fishing. Looks like a pretty hairy area to take sleds.......but I could be wrong. Doesn't seem to easily accessible at least from the shingle creek road and trailhead that we take in.