RE: river hunting?
I've shot more ducks in rivers and tidal creeks than on anything else. Don't hardly know much else to be honest. Good thing about hunting where you are is you don't have the tide to fool with. Always a pain dealing with getting the blocks right, just to have the tide and wind switch and foul them all up. Then the tide comes back in and lifts your too short lines up and carries them upstream. Seems like some mornings we spend all our time trying to fix things instead of killing ducks.
Ducks like to rest on rivers, find a bank or point on the leeward side of a stiff wind, and the ducks will pile in. Oxbow lakes are goldmines and creeks often produce a great spot to set up.