On top of what APS said, I find the best method to getting the water out is installing an inspection port then using a knife to cut out all the foam (or as much as you can get out), because otherwise it will take months to completely dry out. And the stuff closest to the the port will dry out, leaving foam in the very fore and aft wet, messing up your weight distribution and REALLY slowing the boat down. So it is just best to take it all out.
Then leave the port open for a week and let the rest of the water dry out of the empty hull.
One of my buddy did this to an old Laser he got. Then he put packing peanuts in the hull. He sealed the hull before sailing it, so the peanuts haven't been tested yet.
You can also use ping pong balls!
