Only fished the Joe a couple of times. It is mostly a boaters river and not a waders.
You can try below the dams located in Michigan and Indiana.
Be aware that they crowd up with shore fishermen during the "runs".
If you want a better stream experience go a little further north and try the Mo, PM or White.
There are some small feeder creeks in NW Indiana that hold fish but, they are snaggy and not very fly fishing friendly.