As for walking through redds...There is no place that I'm aware of in the portion of the river that will be open that a person can wade across. Perhaps a couple side channels on the Sauk will reveal themselves, but for the most part you'll have to risk your life to walk on an active redd in the proposed season and open areas.

I'm sure everyone will have a story of seeing an accessible redd, but these opportunities will be rare.
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Catch & Release Is Not A Crime