That being said, I still wouldn't worry about salt - except for the trailer. I have seen a trailer that was dipped in the ocean a few times. All of the welds were rusty and the areas under the diamond-plate (fender steps) were swiss cheese. So, I would NEVER drop my trailer in the ocean, but I would have the boat lifted off with straps and set in the water / lifted back out.
Again, 25' and under are rarely put in the ocean anyway.