I don�t have any experience with feed trained bass so cannot comment, but BG, CC, and GC � quite a bit.
CNBG - As mentioned in above post � no observed decreased feeding activity when fishing with pellet flies.
HSB - No decreased feeding activity what-so-ever ...
CC � No decrease feeding activty when fishing with pellet flies.
GC - You are right on � no GC around feeders after catch and release - easiest way to control.
If persistent feeders, don�t release, take them out � too many GC stocked in pond or not enough aquatic vegetation for them to eat.