Replying to Sheboygan, WI..Anybody been?

Super random destination, I know, but I'm going there randomly for a friend's family reunion in a couple of weeks and I have no idea about the place.

It's located on Lake Michigan, so I'm pretty fired up, and we have some awesome accommodations.
Has anyone been to this random place? Anyone live there? What's there to do? Is Lake Michigan pretty rad in general? Any tips for my travels would be greatly appreciated, thanks!