You can always try calling the lac la peche resort. I talked to the owner a few weeks back and he had implied that he seen a few ppl walking on and possibly some sled tracks but he wasnt there when it froze and they did get a large dumping of snow quickly after. If you call they can probably fill you in with some details about if they have seen vehicles out etc. I would certainly assume its good for walking on, but likely pretty snowy and i would not count on driving on maybe even just because of that.
Would love to know more if you find anything out, also any details on nearby lakes. I have been thinking of going to Iroquois or even lac la peche in the near future.
Have a good one.