You must be at least 18 years of age to open carry.
You cannot carry in your vehicle.
When transporting your firearm, it must be unloaded, encased, and our of reach.
Your firearm cannot be in a locked console or glove box. This would be considered a concealed firearm and is illegal in Wisconsin. I am not sure how exactly you can transport with a truck, someone else will have to do this.
You cannot carry in any place that serves alcohol for consumption, even if you are not going to drink any.
You cannot carry withing 1000' of a school.
I don't know the statutes, so I can't point them out right now.