-- Last Updated: Nov-01-12 6:20 PM EST --
"Using a rudder" for major expeditions is normal, for example dropping it to handle wind on a long crossing. All it means is that is spends some time in the water.
This is not the same thing as having it deployed for a surf landing. That is a specific moment within said expedition in which use of a tracking device is considered by many to be a very bad idea. Your assumption that it might add a safety margin runs counter to what many here are saying.
I think the best answer was given above, to contact Paul McCaffrey and ask him if he found a deployed rudder to be useful in surf landings. The consensus in this thread looks to be no, but then again no one replying here is Paul McCaffrey or Freya H.
I also just checked your profile. I find this question to be confusing in light of that.