A few years ago early in the morning I was hugging the shore in my Magic as a guy was exiting a tent.  He obviously did not see me as he prepared for his first task of the day.  We were fairly close when I said in a low voice as to not disturb  others still in the tent. good morning.  I never missed a stroke with the paddle but I am sure he missed the tree for a while.  He never said any thing to me although he did make some noise.  
MagicPaddler