Use the motor to stop the boat
If your prop walk is in the wrong direction can you switch to a better slip? What type of boat do you have and motor? An incoming or outgoing tide might also be part of the culprit/savior. I suggest you take a booze cruise every night at sunset, the dock will be mostly empty and wind calm, do it 30 or 40 times till you can do it in your sleep. Have a few friends to fend you off.