I dont know many spots for crappie at all as I just started chasing these fish last year. The spots I know would be the sloughs south of elk grove, but the shoreline is thick with shrubs and not ideal for fly fishing.
Hes a roookie, crappie fisherman use livescope or vertical jig fish, I say this because I never seen someone retreieve crappie like this and yeah you get crappie but mostly smaller agressive ones, big ones like are smart and dont go for fast retrieval. Just my opinion tho