Done that more than once myself; drive the hour, set up a small shelter, fish a bit then head back home & come back later w/ the fam or early the next morning. Never did 2 sites for privacy, but have for pals that were coming up later...rode up bright and early on the first day of my reservation and put up the tent to stake my claim...lol
I always find a corner site or one on a curve gives you more room on either side.We scout our favorite campgrounds and look for spots where someone wont be right on top of us.
Thats we do as well...I keep our fav spots in my cell phone and rank them from first to last so whenI always find a corner site or one on a curve gives you more room on either side.