There's a place on the middle fork of the Feather river near Clio that is loaded with 3-6 lb carp and i've had decent luck during evenings in middle of the summer catching them on my 5 weight with brown buggers and 4x tippet.
They fight well. Different breed of carp than i see in my home waters. Those over there are shorter but fatter. I release them as others fish sport for them as well. It's fun to get a bunch of hookups on heavy fish after going several days with not much other than the usual dink trout.