Since you were chasing powder turns, you probably didn't take the long green from the top of Dreamcatcher. It's great fun with good visibility. Best if the cautious skier is following someone who's done it before. There are a few places where it's important to keep up speed as the trail goes down and then up. If too cautious then won't have enough speed to get to the top of the hump.
There are groomed blues off Dreamcatcher and Sacagawea that are fun. Ended up on them last Dec since there wasn't enough coverage off-piste yet. At one point we were looking into some trees when a group of local tweens stopped before heading in. The oldest boy pretty said it probably wasn't a good idea because there wasn't enough snow. But that he knew where all the downed trees were so the kids would be okay. We took our time stopping and looking on the way down the groomer. The kids were taking a shortcut but came out after we did.
I was planning on hitting GT on the way to Big Sky this season because it's the last season for the cat skiing. Changed my plan a few months ago mostly because I had friends interested in a different ski safari in a completely different region.
Given a history of ACL injury, I'll repeat the recommendation of lessons. The reason I started taking lessons fairly regularly at my home hill and at destination resorts is that I popped off an ACL in 2012 (not a skiing injury). My knee injury and personality led me to opt to work towards being a "coper" instead of having ACL reconstruction surgery. I put the money I could've spent on a custom brace towards lessons, mostly semi-private with L3 instructors recommended by name. If your wife is interested, she can read my story
here.