Have been enjoying Jordan Lake for years!  We live about an hour away and whenever we want to just get away, we hop online and reserve a spot.  I think the only time they are booked solid is maybe a holiday weekend.  If you want like on the lake, you can't do it last minute, but we don't care.  The sites are HUGE..they aren't those parking lot type sites where everyone is on top of each other, except around the lake they are a little closer.  Electric and water and two dump stations, so be prepared for along wait if you are leaving like a sunday.  Each site has a very clean picnic table and fire pit.  Bathhouses are very clean.  Lots of walking trails or just enjoy the quiet.