Lake Murray - 50,000 acres of fun, 41 miles long, and 14 miles wide at its widest point. When the lake was finished, it was the world's largest man-made reservoir.
Unfortunately, only two or three good marinas with music/nightlife. The water is down now, so do a little rain dance before you head this way.
PM me if I can answer any questions. I have lived on the lake for 16 years.