Having trouble locating bass in shallow new england reservoir

The reservoir I fish has an average depth of around 3-4 feet. There are lots of flats some sandy and some muddy. In the middle of the lake is a narrow windy creek that has a depth of 8-13 feet. The water is currently 48-54 degrees. The clarity of the water is about 3-4 feet. Not a lot of structure besides the creek. The only cover is the occasional stump and some brown dead looking milfoil. I've been catching bass on the shallow flats, but have not been pulling in numbers. My best day so far is three bass. Having a hard time locating them. I fish on the edges of the creek channel and never have luck there. Since it is so shallow I feel overwhelmed because it seems the fish could be anywhere. I'm not able to narrow down the productive waters and find staging areas. Need advice please.