To be honest I have not yet open carried in Lake Geneva and to be equally honest...
I would not let that stop me from open carring there. Best way to find out is to carry there a see what happens.
If you are new to open carry then it might be better to start with a known OC friendly place of business.
I am kinda close to Lake Geneva and would be happy to meet you somewhere so we could open carry together... to see what happens.
Outdoorsman1
As far as I know Lake Geneva is one of many places that still keeps an unenforceable "no carry" ordinance on the books: "No person, except a law enforcement officer or person authorized by the law to do so, shall within the City in any vehicle possess, carry, place with him or have under his control any firearm or air gun, unless such firearm or airgun is unloaded and enclosed within a carrying case."
That doesn't necessarily tell you anything about their current view or practice. Wouldn't let it stop me since it's not a valid ordinance. Watch out for the school zones however.