Sorry you've not gotten any responses, but most "former" Wisconsinites, like us, I suspect no longer count Wisconsin as their legal residence once they've gone full time. Between Wisconsin taxes and winter weather, there are better alternatives.
You might try calling campground owners/operators to see if they employ any campground hosts or "workcampers" as many of these are full timers. Personally I volunteered for the Dane county parks system as a camp host and I know a number of their volunteers were full timers that would leave the state in the fall, heading for warmer winter weather, and return in the spring or summer to be near family or friends.
For what it's worth, Walworth county was my home for many years, back in my youth so I'll be interested in what you come up with. I went to high school in Delavan and college in Whitewater.
Good luck in your search. The full timer demographic is growing by leaps and bounds and we meet many in our travels. Some, like us, are pursuing a retirement dream, some are forced into it by economics and others have found a way to mix their wanderlust with a way to make a living.
Jay & Peggy Monroe with Dolly
Can't take it with you - don't plan on leaving any behind
2016 Newmar London Aire 4553, Spartan chassis
Wrangler Unlimited toad