A similiar thing happened to me when I was fishing with my dad during the spawn a year or two ago. We were coming up a bank and another boat was coming down the bank. We trolled out to deeper water and back into the bank after we had passed them a good ways. We let them fish the down the bank. After we eased in close to the bank again we started catching fish where a creek channel swings in close to the bank. They had just fished thru there without catching anything. When they saw we were wearing them out, they come back and tried to root us out. I spent the better part of an hour blocking them out back and forth with the trolling motor while my dad was catching them pretty good. The spot where they were holding was about the size of a pick up truck.
Fear God, Love your neighbor, Catch fish!
Romans 5:8