Erik and others,
I ended up drifting on Thurs and Fri last week (jan 12/13) and fishing was good but not great. Warm, sunny days with no cloud cover. While the baetis hatch was apparent, it wasn't as prolific as late December when the cloud cover combined to create better hatches. That said, we took quite a few fat rainbows on both days:
All these fish were taken on small #18 mayfly nymphs -- S&M, Micro May, etc. The fishing would pick up around 11 am and stay good until about 3 pm. We didn't catch much of anything on either day past 3 pm.
Will be back down in spring for the caddis hatches....