Carol lake near Minocqua is terrific
Turtle flambeau is nice but a ton of small walleyes. I would definitely go somewhere in northern Minnesota rather than tff.
Check out Ely Minnesota very cool town remote waters with cabins and you also could take a day trip into the boundary waters.
I will second the Turtle Flambeau Flowage, and from personal experience, Flambeau Vista offers an excellent venue with very nice cabins (2) in a private setting... cabins and hosts Scott and Kathy are top notch!
link to the association and map with loads of information on the TFF including accommodations, fishing, history, etc...
edit: here's a link to the Navionics Web App that should be pointing you at the TFF... you can zoom in and see details, contour lines, etc.
on lower left corner, you can click on the round sonar icon and change to Sonarcharts for more detailed depth contours
Leech Lake is a great fishing lake and not that far a drive from you. Not a super Canadian feel, but it's big water and very scenic. We stay at Birch Ridge Resort on Sucker Bay on the north end. Great place. Check it out.
Or you could try Kabetogama which is a US/Canada border lake. Can't get much closer to what you're looking for. Don't recall the name of the resort we stayed at, but there are a few.
problem I have with those two flowages is neither feels like Canadian fishing. I do not think I have ever been on a lake in Wisconsin that made me feel like I was in Canada. The lakes just fundamentally lack the size and structure to give you that feeling. Those flowages are decent size and rustic....but the fishing is in 10FOW max with an average depth change of 1"
The Willow Flowage north of Tomahawk is pretty rustic. There's around 80 miles of shoreline and a very small percentage of it is developed. There are a couple of lodges with cabins, the Willow Wood and the Bucksnort Resort. Can't vouch for either one as I've never stayed there but have fished the Willow a few times.
If fishing is the priority of the trip I would highly recommend making the drive north of the border. There isn't anything like it. Yes Wisconsin and Minnesota can offer great fishing but Canada not only produces excellent numbers but outstanding size. If you are looking for a nice family getaway with some fishing mixed in the Presque Isle area will give you some nice solitude. The Cisco chain is also a nice body of water. You can even head up to Lake Vermilion and enjoy some nice scenery. I haven't been to the Brainerd area but its on my bucket list. From what I can tell is looks very nice there.
It sounds like you are looking for the Turtle-Flambeau Flowage.