I have a decent knowledge of the boat. I've had it 7 yrs. I have
eliminated everything internal. The only thing I can think that is
causing it is a crack. My question with that is that why is the water
only dampening the carpet and not accumulating? I guess it could be
high enough up rather than on the bottom.

I think the next step is probably (unfortunately) obvious- pulling boat
out. As I don't have a trailer and the closest dealer is 50 miles away,
it is a problem....