I'm sure others will chime in along similar lines, but I would be extremely hesitant to venture out onto our rivers, especially if you have little experience on hardwater (not saying you do, I'm only assuming so since that was your first post). Moving water doesn't build ice as quickly or solidly as our lakes. True, the lower reaches of the rivers you mentioned can have fishable ice, but as others can attest, you might be sitting on 6" and find yourself on 1" a few feet away. At minimum, I recommend waiting until later in the season and even then, only after an extreme cold spell. Bring your spud bar, throw ropes, and don't go alone.