There are plenty of options out there, just depends on how much you want to spend. The first question is: do you have to watch the game in the fish house? If not, you can rent any shack that doesn’t have a TV and head to the local bar and watch the game, either in Isle, Garrison, etc. But, if you want to be able to fish and watch the game, you’ll have to spend a bit more, especially because you’ll be paying weekend rates. Look to places life Fishermen’s Wharf Ice Cabins or Appeldoorn’s 22 Hole cabin. All of these are a little spending with a few people but become much more affordable the more you have. If you’re only heading up with 6 people I would suggest a skid house through Appeldoorn’s. You could get a 6 man-8hole premier house that comes with a TV and generator to run it. Check with them first though to make sure they actually get service out there. You mentioned Hunter Winfield’s and yes, they have DirectTV to every wheelhouse. However, the small ice castle houses are much longer than they are wide you you guys might be tripping over each other a bit. Those houses are best for 3-4 guys.
So, the moral of the story is: the cheapest is obviously go to the bar and, being Packers fans I assume all of your group enjoys plenty of beer. But, if you want to fish too, get a set number of guys that are going and look for larger skid houses that are large enough for all of your guys and that have a generator provided to run a TV.
Hope this helps.