Paulina Lake won’t see a lot of callibaetis hatches for a bit, but the dry fly fishing is good with midges in the early morning, and beetles, ants and hippie stompers in the afternoon. 
Balanced leech, 2 bit hookers, rainbow warriors, chironomids, black double down, callibaetis cate and red PT are my go to nymphs for Paulina for the next few months. 
*Callibaetis hatches at Paulina lag behind East Lake hatches by quite a bit. I even question if Pauline only has one brood, where East Lake definitely has 2 broods.