I always wanted to do a duck hunt like you described! I've flown over the area a couple of times and was amazed at all the habitat. Of course, my thought also was: How do you get around to where the quackers are after that? I think that a small inflatable with an electric or 5 or 10hp gas motor might be a good idea.
Please let us know, if you do go back, how well you fared as I must hunt vicariously through these posts.
All the best!
No need for a boat for most of the ponds over there. Most of the lakes are shallow enough that you could almost land in them with wheels. If the plane is on floats it most likely will only be submerged to the keels. Now where did I put that Trade-A-Plane? A nice C180 would fit the ticket..lol