Hey, I fish middle river quite a bit (might head there today actually) and there are some bass in there, some good ones too. Im not much of a bass fisher but in Middle river there is also Catfish, Trout, Eel, Suckers and snapping turtles lol. Its a great river, water is still cold there. I take my canoe up it all the time. you can get a boat down there but you kinda gotta carry it down a hill, I dont think theres a good boat launch. If you want any more info about Middle just send me a PM.
EDIT - You dont NEED a boat to fish the river, theres lots of room for bankers and lots of river to walk up and down.