This is our first winter with our new Jayco, a 2014 Greyhawk. We have done nothing to winterize yet and night time temps are starting to hit the mid-30's. At what point does it become critical to plumbing, etc? We are planning to take it out in two weeks and again at Thanksgiving, then it will be packed away until Spring. Should we do some winterizing now, and then again after our remaining trips? Time is super tight for us now, so if we can safely put it off we will...but obviously don't want to risk damage! Any suggestions for us newbies?