Replying to Sledding + Skiing GTA

just got an old ski doo since i wont be travelling out west this season...

here are the spots i have in mind; has anyone been there/done that? are they worth it?

this one is by mansfield and dufferin country forrest; no worries about trespassing

this one is by blue/georgian

this is by dg; ive heard there are decent clearings over there

talisman

There are some other cool lookin spots up by lake of bays and minden that go above 500m elevation that i would like to go check out.