Needemp

I have this lake that so far this spring has produced the 3 biggest bass of my life, but now it has gone into the post spawning period. The lake is probably 30 acres, averages 10 feet deep, its about 30 feet deep in the middle, it has an active creek, but no visible creek channel. There are no slopes or ledges, brush or any kind of structure 10 feet from shore. The only forage in this lake is bluegil, crappie and crawdads. Oh yaeh, and its pressured from shore a lot. Any tips on finding these big bass? :-/