Based on feeding and fishing observations, medium and large BGxRES and YP often congregate around the post caddy. It is (naturally) a snag magnet, so I don't push fishing too close too it. It is adjacent to finer, denser structures made from 1" and 3/4" black plastic water pipe (thrown away at the well drillers I passed every day on the way to work) as well as tire structures, 3-4 smaller (12' - 18" diameter) tile pieces, a "Bluegill Condo" (Bruce Condello term for a stack of buckets and 6" and 4" corrugated field tile sections, large pieces on the bottom and smallest on top), and the remains of an old round bale feeder that I got very tired of rewelding.
YP and (dang it) CC breed every year using some parts of all this structure.