Bring the biggest flies you have. Crawfish, any minnow pattern, frogs, mice, poppers. They all work for bass. The bigger the better or you will just catch a ton of bluegills and rock bass on small stuff. I don't really know too much about carp flies but there are carp in there well over 20lbs. The bass are not too picky in mid summer from my expierence there, you just have to find them.