I agree with DSTUD's advice. I lived by Elk Point, SD for 5 years and fished below the dam regularly from 1998 to 2000 before moving back to Wichita, KS in 2003. I lived on the Big Sioux my last 3 years there and could fish in my backyard.I am from Kansas but I have fished there several times as I have friends from Yankton. I have had pretty good success below the dam along the rock riprap areas. I used creek chubs from the bait shop there and caught several channals in the 10lb. range as well as several flatheads 5-20lbs. You will need 3-6oz. of weight depending on the release. I know i'm not local but this worked for me.