Scott I'm a real novice at the float and fly and I know a lot of folks (probably everybody) can answer better than I. However I have never let a lack of knowledge stand in my way.
#1 Bob Coan said he was about two weeks away from switching to fnf exclusively because the water temp was not cold enough. ( I'm sure it has not dropped any since that weekend). He was fishing fnf early in the morning and late evening and fishing jig or sonar etc. the rest of the day. Everyone was fishing where they were because the lake was turning over and was almost black at the dam area. Most were running to clear water.