I have fished Fletcher and one thing that I remember is that the drop is a distinct transition and what I found on the day I was there is that the fish were relating to the shallow flat before the sun was high and as it rose the fish moved off the flat and repositioned onto the transition between the shallow and deep, basically hugging the transition. What you have to remember is that every day is different and you must not get hung up in what worked for me 10 years ago but what the fish are doing that day and more percise that minute. If your going during the spawn then look for spawning habitat. If your going after the spawn look for the nearest structure adjacent to the spawning flat. As Summer progresses they should move off and onto the secondary feeding flats but they might move up during the morning. I see this happen on Klinger in Sturgis during the heat of the summer the fish will move up in 2 ft during the early morning and then as the sun moves up they will move off to deeper water.
Hope this helps.
Rich