Just curious if there are any weird rules about hanging in Milwaukee county parks?

I haven't picked up my hammock yet, either this week or next, probably. I only have one tree at my house, nothing on the other side. My parents had to cut down the second of a perfect spaced pair of trees in their yard.

I have every intention on building a stand for my yard, but would like to play with setups before an upcoming trip on the 23rd.

Anything I should know before I head out and start finding a test ground? I have quite a few parks close to me.