Re: find the warden/crestwood

Once you speak to Hawke, you are supposed to have crestwood on your table map to then use points to unlock and explore.....it may have something like find the warden or something listed on the map, just below the Coast map icon where you recruit Iron Bull, and next to the Deep roads expansion.  Table map, the one with your three advisors that you can dispatch/assign missions too, located down a hall near where Josephine sits in Skyhold.

If it didn't unlock, then sounds like a glitch.  If you have a pre-unlock save, then verify your install files, and try the sequence again.  If you don't have one....ick.

If it did unlock but you overlooked it because it is "named" the find the warden or something, then well now you know and good luck......