BIG PROBLEMS-- BIG MONEY
Conn. went through this problem last year. And from what I have heard it was a major problem for boaters. You may not be to bad off where your boat is newer. I would strongly suggest carrying a spare water seperater filter and spare engine fuel filter. You may also think about putting a stainless clam shell over your fuel vent. That is the number one place for water to enter your fuel on the boat. I would also run your tank down a few times during the season, so not to let the tank have old fuel sitting on the bottom creating the gunk. It can be so bad for the older boats that fueling up stirs up the gunk and they don't even get off the fuel dock before all hell breaks loose. I posted something about this on thehulltruth.com and got some replies from the Conn. boaters.
Edited to remove direct link.