Thanks for the info Turbo!!
My wife insisted that we do not use the antifreeze because she belives that at some point in time it will harm us. I do belive she has a point so I happily oblige her and blow out the system at the end of the year.
This year is different in that we have a new Crusader 355BHQ and will be doing this for the first time on this rig.
Our dealer said the same thing that we should use antifreeze but maybe they think I am going to buy AF from them........