I've never really fished Southport. I do my salt fishing in the Shallotte River. My family owns a house on the river at Shell Point. So I know quite a few trout holes in the Shallotte river. As far as crappie in the Black River, check out my post where I gave away my GPS waypoints. Pretty much all of the little dead end creeks and oxbows in the Black River hold crappie. I've had the best luck long lining with minnows just going back and forth down the middle of the creeks in the Fall and Winter. In Spring (mid February - early March) they'll be shallow around the base of the Cypress trees in the back of the creeks. As far as Lake Waccamaw, I've caught crappie in the canals, but never really killed 'em. If you ever want some company holler at me!

I do know that the ADM docks in Southport is famous for holding trout.