First do what FF suggests. You may get lucky.
If my memory serves you have a Californian? 70s or 80s vintage? If I'm right about what boat you have you may have the layout where the tanks are between the stringers under the decks. If so there will be a small gap between the bottom of the tank and the bilge at the keel. You can use an inspection camera on an extension to look for the drip. Then you'll know where to cut to fix the leak.
Some things are worth doing simply because they are worth doing.