As far as I remember, we fished them chars deep. They congregated in the deepest, and the warmest at winter, spots. So colorful on snow, I admired them. The setup was quite unusual - I haven`t seen anybody fishing like this at local reservoirs. Light jig at the end of line (this takes the rig down to the bottom), then like 4-5 droppers with so called marmish or weighted flies imitating some bugs. The whole setup looked like a garland. Sometimes we used grubs on hooks, but mostly just used those waving motions to mobe the rig up and down at different stroke and amplitude. Since droppers were in 2 feet distance from each other one could effectively cover a significant range of depths. We also took some trout on this rig occasionally.