WI Preemption (66.049) All local ordinances are null & void now no matter when the localwas written. The wording in 66.049 is cloudy because of the dates, but basically all local ordinances can do now isregulate is the discharge of a firearm. Nothing more!
Transport unloaded in a case that is specifically made to hold a gun, (wrapping it a burlap sack is a no-go) A "Gun-sock", and a hard case are fine, even a soft zippered case is fineas long as all closures are closed fully.
No magazine in the gun, & No round in the chamber or cylinder of the gun. It does not matter where the ammunition is, as long as it is not in the case. Where you really got to watch yourself is in Illinois if you travel through there.
"Out of reach"? Well, lots of debate on that one for WI and alot of misinformation about it toodue to some case-law (WI V. Alloy in particular) where a guy was acquitted of many other charges including murder, but they got him on concealing even though his gun was in a case, but no word if the gun was loaded or not. I suspect he had a loaded gun in a case and that is why he was found guilty.
To be absolutely safe, put the cased firearm in the trunk of the vehicle or out of arms reach.
Although I regularly travel with myunloaded properly cased firearms in the cab of my truck, according to the case law I mentioned it is questionable if legal or not.
If you are concerned, put a trigger lock on it. I see no way that could be used against you.