Deploying two anchors

I am on page 241 of Roger Olson’s book “Plot Your Course to Adventure”. He is describing a technique for deploying two bow anchors opposite each other. In his diagram the angle is 180 degrees. I am going to try this out. The end result is a type of DIY mooring. I am wondering how others normally deploy two anchors. I am not interested in limiting swinging room. Rather, I want something secure so I can leave the boat alone for a week.