I've hunted Neb. twice on rivers both times although farther south than it sounds like you are. Two thoughts- Private property is going to be an issue, it may not be posted now but gets that way in a hurry this fall, especially as many farmers lease out their property to hunting guides. The second is to scout later in the year, especially after the first really good freeze up which is when your rivers get damned good! I would have 3-4 good sites selected and get permission now so if someone else moves in on you, there is a back up plan. We killed woodies, hoodies and cans there along with geese and mallards, I am envious of you!
There is no help for this kind of insanity. I'm just a duck hunter, and should not be held accountable for all my actions between October 1st and freeze-up. Gordon MacQuarrie