I think it’ll certainly be possible. I did a half-mile last week without chains on multiple occasions to get away from the plowed roads.
The issue with Mille Lacs is how it cracks up so commonly, especially after weather changes and high winds, like what we’re having right now and into the weekend.
Every time you take a truck off-road and there’s enough snow to hide potential cracks, you run the risk of dropping a wheel or two into a crack, or worse. Happens every year. It’s a tricky lake. I’d keep off-roading with trucks to a minimum if there’s enough snow cover to hide the cracks.