Clay Hash has mapped out the major hatches on the yuba and listed several flies that match the hatch.  He also has a weekly report on the Yuba.  Check out his website and blog for up to date info.  If you are a spey guy he has a spey class for the yuba.  If you are dry fly guy he has the flies!  As far as catching more fish check out Hogan Brown's and Ryan Johnston's websites.   All three are great guides on the Yuba. http://flyfishingtraditions.blogspot.com/

RJsflytrips.com