Yes, I do as well.
It's ok if you want to make a map "after" you have found somewhere to go, but of little use before hand.
Much of Ontario's crown land, at least south of North Bay, has been (administratively) handed over to the counties. Some keep decent track of it, others have sold or leased chunks off (and rarely publish it) and usually what "is left" is so inhospitable that even billy goats couldn't use it (bogs/swamps).
So if you see something on the land use tool, then you have to start the leg work. I have found a great deal that was "hunt-able" already had established "camps" - and in some counties you don't want to wander in to the wrong "camp"
Then, as an example, in Renfrew county they "lease out" pieces of crown for hunting - it's all cut up and they have distance requirements between camps etc and they charge property tax for the use of.
In my county we found a piece using the tool - then called MNR (MNRF now), they told us it was under control of the county. We went to the county offices and they told us it was the Ministries jurisdiction, so we ended up hunting it and have no flack/feed back. But that was one small parcel of about a dozen that we have tried to use over the years.
Short answer - NOBODY that gets paid by taxpayers, at any level of government NOR any map that they have produced is going to help you out very much at all.