Your best bet to find good fishing spots in the area you might be camping is to stop by some bait shops. There's not much reporting on this web sight.......
Green Bay perch, Bay shore park, Brown County
MOON PHASE (78%)
71° - 75° F
Yes, there are some perch around. But no, they aren't everywhere or every day. Four people fished multiple spots Saturday and only managed a few small ones thrown back. Sunday solo I had a limit of 10"+ in under two hours.
And talking to others at the Bayshore campground, it seemed like everyone was finding a few, but nothing great.