I used to do tag trout tournaments and as a fly fishermen I did very well it the water was clear and and some what low. However if it was up and rolling I used a few different tactics. One was to use a gold head with orange or chartreuse grub. Then I would put a black wollybugger for my point fly. I could cast these with a light spinning rod and did not have to have a little extra room for my fly rod. I think this worked for me for 2 reasons. First I could get down a little better with the shad dart type head and it also gave some extra movement to the fly. Usually I caught the rainbows on the magnet and browns and brooks on the fly. I am sure this could work well for crappie and gills also.