I have done the mooring and slip on my J24 which has NO automatic bilge pump
in several locations on Long Island and prefer the mooring as even after a monsoon its rare for more than 5 gallons of water to be in the boat .
The big down side to the mooring here is its a PITA to clean the boat BUT on the bright side it rained a LOT this year and i was able to scrub and let nature rinse the crap out of it
several times a week
When i had the boat in the slip i always had to be real carefull about how the boat was tied up and protected from dock rash