If memory serves, there are only 3 lakes you can fish with a Wisconsin license. Mamie, West Bay and Big. Outside of those 3, I think the rest are in Michigan and would require a Michigan license.
I bought a Michigan license two years ago when my wife and I stayed at Jays Resort on Thousand Island. I think we bought a 5 day license, or something like that, and it was still pricey. But, worth it in my book in order to fish Thousand Island and Cisco Lakes.....