Well, I just boat my first ever boat, a 2002 170 DC. Need a trailerable cover for it. It has railings on the sides and bow. I have only found covers for 170 DC w/o railings. Anyone knows a source for one with railings? Also, the marina guy says that covers are not good for winterizing the boat since they are not water proof and do not breathe - suggests shrink wrapping with vents. Is that true or is he trying to make a quick buck?