"In Wisconsin the first thing that comes to mind is bratwurst. "
That is probably true.
If you're in range of Elburn, Illinois (a very small town about 45 miles due west of Chicago) you need to visit bratwurst Nirvana at Randy Ream's Elburn Market. It's a small, family business run by a second-generation owner who is a sausage genius. There is no more room on the walls of his retail store for any additional framed awards for sausages, mostly bratwurst.
I'm headed out there next week to pick up 900 brats and 900 frankfurters (all pre-cooked and frozen) for my Rotary Club's summer season of fund-raising hot-dog stands.
A couple years ago we were in Sheboygan, WI, and of course we had to have the hotel's bratwurst special.
Sorry - not anywhere as good as Randy's.
If it weren't a 100-mile round trip from our place, we'd be there every couple of weeks for sausage supplies.
Unfortunately, I don't think he FedExes sausages (he makes thirty or forty varities, all outstanding) but I'll ask when I'm there next week., and if he does, I'll let you know.