i just got back from checking out the decorah area streams this afternoon , here's my report

Upper Iowa River  back in its banks; BARELY,  surrounding fields have much standing water
North Bear   2pm  back in its banks,  (normally) dry side channels full and/or flowing.
                             somewhere between muddy and very very very cloudy, vis 2feet?
                             took me about 30 minutes to hook and land a trout.
                             tried pools and back waters; no joy , no even a strike
                             then tried a riffle (pocket water?) and had a strike quickly. Figured was rainbow, but was brown
                             quit after catching that one, which was on a beadhead green and partridge with wire rib and peacock
Waterloo   3pm    back in banks.
                            between very cloudy and cloudy
                            took about 20 minutes to hook and land a trout
                            only fished one spot (end of a riffle and start of a run)
                            brown trout on beadhead green and partridge with wire rib and peacock thorax (i call this a Green Retro)
                            quit after that one
French     4pm     high, well within banks
                            between slightly cloudy and hazy (which is pretty bad for french)
                            I didn't fish, cause i was hungry and wanted to go home

I think (assuming that the weather cooperates) that this weekend will be okay for decorah.  I'd fish Waterloo [Don't Forget!  parts of Waterloo are catch and release; And access now goes all the way down to the upper iowa]            Have fun!