oars over a motor?
I''d just add this, that I keep a pair of 9 1/2-foot dory oars aboard my 28 footer just in case. A dory is 20 feet long so that size may work well for you. Before you go engineless, get your oars and set up your rowing station. Now, on a calm day, shove off and see how far you get before you fire up the motor.