Where in Mid Tn are you?
My deer camp is in Reagan, Tn just up 100 from Decaturville there and I used to duck hunt alot up there mostly around where that refuge is now on the east side of the Beech River Pump Station lake there at the camp ground. Cotton Ivey used to have a place back in there not sure if he does now or not. It is not what it used to be but if it is close I'd go for it.
We used to scout all them creeks and rivers and drainages from Cuba Landing down to Gumdale even to where WhiteOak Creek runs in there south of Saltillo, my grandparents had a cabin there on the point for a few years, and hunt where ever the ducks were at. As long as you stay in your boat and set up along the river or creek you are legal. Lot of canada geese is some area's down there.
If times get hard go shoot them ducks at Michaels Marina:D