Check around the rudder as well. If you go to a non-busy launch, I would have someone back the trailer in slow while watching to see if any water begins to build up in the back.

I have noticed that there is water around the v drive from last time even if we pull the plug. We dry the ski locker each time out, but I think the low point of our 22 is between the ski locker and the v drive under the floor and we can't seem to get it all out.