The thick brush is ideal habitat for young baitfish. It could be offering them too much protection though. If you aren't catching a bunch of little crappie, I would guess that your bass are keeping that population in check. I would keep the crappie you catch though, because as S Brown said, they are hard to manage in a small body of water. I would still say you need to harvest a good amount of LMB until the fish start to gain some weight.
