Being that I am in SC and that SC is a 2-rod bank fishing state, I use 2 rods... maybe. I rarely use more than 2 rods anyway, whether bank or boat, and many times, I am fine with just using 1 rod. I only have 2 hands, so having 2 rods out at the same time can be a bit problematic, especially when both lines get hit at the same time often. I'd probably go nuts if I had more than 2 rods out at the same time.
The problem I have using 3 poles is I find myself jumping from rod to rod not catching anything lol and spending alot of time rebaiting. The action is alot more intense but the hook ups is less. Now we only have channels here in Central Florida. So it might work better with more poles for flat heads or blues else where??? But I will prob use atleast 2.