I would agree with everything that has been said so far. Where we are, having waders is far more important that having a boat. The best places to hunt around here can't be accessed by boats (canoes yes).
I also agree that decoys are better to have than a call.
As it gets into late season you'll want more than a dozen decoys. It's getting into late season here and I had some yahoo's come set up real close to us on Saturday and they only had a dozen decoys and we had 3 dozen out and those guys didn't pull the trigger once because every single duck came to us.
Thomas makes real good easy to blow calls. They're quiet but good. However, they're pretty hard to find these days so I would recommend the Power Hen 2 (PH2). most places will sell this and its only $25-$30.
Motion in the decoys is important and around here we just rely on the wind to do that for us (SUPER windy here), and if the wind doesn't blow two things happen: Hell freezes over, and the hunting sucks.
Let us know how the first hunt goes
Don't hesitate to ask via PM
BurdBuster