Seeing as WildWood is a city park, this applies there right.
Exclusion of Firearms on Property
The law creates several new definitions of trespass, which are added to the existing trespass laws found at Wis. Stats. 943.13. Violations are classified as Class B forfeitures (a fine of up to $1000.00)
With some significant exceptions discussed below, the new law gives the owner or occupant of a public or private building, a landowner or occupier, or special event organizer the ability to give notice orally, in writing or by posted notice that firearms are not allowed on the premises (building and grounds). Apartments and condominiums may prohibit the carrying of firearms by non-occupants on the premises. Commercial landlords and tenants will have to work out policies on a case by case basis according to the terms of their leases.
The notice prohibitions specifically do not apply if the firearm is in a vehicle driven or parked in a parking facility, or to any part of the building, grounds or lands used as a parking facility.
In addition to the parking area exception, the notice prohibitions do not apply (and concealed carry by licensees is therefore allowed) on private and public college and university campus grounds as well as city and state parks and other public grounds.
A notice prohibiting firearms can be oral, in writing, or by posted notice. The posted notice must be at least 5 inches by 7 inches, and must notify individuals not to enter or remain in a part of the building with a firearm (or a particular type of firearm), and must be posted in a prominent place near all of the entrances to the part of the building to which the restriction applies and any individual entering the building can be reasonably expected to see the sign. At present, there are no specifications regarding font size, etc. (Many states with similar statutory language, such as Minnesota, have very specific signage requirements).
While the law provides for oral and written notice, the prevailing view in the legal community is that as a practical matter the lack of signage would render the prohibition legally unenforceable.