Hosmer (Upper) Lake and upper channel is fishing super good. NC Phil was up this week and hammered them on a Hover Line and the Red PT and Black Double Down nymphs.. Troy also reports good stuff from Hosmer and enjoyed some dry fly action with Callibaetis and Ants and Damsels. 
Damsels, Soft Hackles and Small Leeches on a Hover or Clear Camo are often dynamite here and a good alternative to the indicator rut. 
Look out for Travelling Sedge (Big ass caddis) and fish a Goddard Caddis Skittered across the top. And if you stay to dark, the Caenis hatch ought to entertain you or frustrate you. Both are fun in my opinion. Frustrations in fly fishing teach us that we are not always in charge, and we play games that are not always won. I like that. Be aware of water temps on the lower lake, they alternate from safe to too much so take a reading and decide where it’s ok or not to fish.