I never fish the south end of brookville until at least May. I usually fish up close to the idle zone. The flats there usually offer some of the better fishing.
The reef between fairfield & egypt hollow ramps, is a good spot this time of the year. As the sun rises, the fish move out to the east side drop off in the deep water. Usually in the 20' to 30' depth. Jig em slow with minnow or crawler. Both bass and walleye can be found at the same location. Crappie ? I have no idea about brookville crappie. Them critters are on the move to much. Here today, gone tonight.
I don't bass fish but, at times, its pretty easy to hook some nice smallmouth south of the fairfield flat on the east side. Right against the shore line by the old road bed. 3" tubes texas rig. Put it on the shore and slowly hop it back down into the deep water. Works for me. The trick is, finding the right color and, use some sent to block your smell. I think fish can smell better when the water is cooler.