Yeah, I agree that paddles are quieter than pedal systems. Keep your blade vertical throughout the stroke (including entering and exiting the water) and minimize contacting the kayak with the paddle and you'll be plenty quiet for fishing.
"Water is life's matter and matrix, mother and medium. There is no life without water." -Albert Szent-Gyorgyi
"No man ever steps in the same river twice, for it's not the same river and he's not the same man." - Heraclitus