I don't think either river herring species would work in a lake that small. Like Cecil said, they are very sensitive to water temp changes and require water quality in the range of striped bass. This is why they make such good forage for landlocked stripers, trout and salmon. They too hang out in the area of the thermocline where the water is cold but still oxygenated. Not something commonly found in smaller lakes. They also require very specific spawning areas. Usually small streams to moderate sized creeks. Blueback herring are even more difficult to maintain than alewife. They seem to be more sensitive. A lake I fish in has both stocked in it and they do fairly well. The stripers hammer the snot out of them. But from the research done at the lake, the LMB feed mostly on gizzard shad. Also, alewife and bluebacks are nasty predators. They feed heavily on the fry and YOY of game fish. Do research on the studies done in TN on the diet on both herring species in their lakes. They destroyed the walleye fishery in more than one lake there and have severely impacted other species. They're great forage in their native rivers like the Potomac where I fish. I catch them using Sabiki rigs and use them for bait for stripers and blue cats and their YOY are eaten by everything in the river, but in lakes they can cause issues. In your shoes, I'd work with golden shiners and as your bass community progresses in size, then consider stocking gizzard shad.