The flight by Algonquin Park staff I mentioned last week took place yesterday and the results are posted here.
Unfortunately, they didn't have much to say...
All lakes remain ice-covered. Ice thickness is variable throughout the Park. Another flight is scheduled for Friday morning (April 25th) -- weather permitting -- to determine the extent of ice conditions on lakes and rivers.
There are photos from the flight on the Algonquin Outfitters blog, although none of Canoe, Tea, or Smoke Lakes -- the closest is Source Lake which looks pretty tightly packed still (as do most of the other lakes pictured).