canoeboy,
Here are some WI river route links:

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Sadly, their info on the Flambeau is thin at best.  I did the section from below the dam to Park Falls (is that the Flowage?) about 3 decades ago.  It rocked...wide river sections broken by fun whitewater.

You might want to check out the Bois Brule too.  There's one set of rapids that must be portaged but the rest are a blast to run.