There's more to it than engine innards - salt water's bad for lots of boat stuff. If you do go, just wash the crap out of the whole boat inside and out when you're done.
Mine won't go in salt, mainly because I know I'm gonna own this thing for many years, that the cleanliness of it can only go downhill from here and whatever I can do to keep it nice now will be good later on.
I'm SURE that a weekend in the Keys would be an AWESOME thing to do in your Epic, though. Just be safe, and wash the crap out of it when you're done.