Is it necessary to "winterize" my camper for one night of freezing temps? Im out camping and the temps are to get low 30's to high 20's (southern oregon). Everything I read consists of draining the pipes, water heater and RV anti-freeze. Seems like I can get away with just draining the lines and heating everything back up in the morning. Live in Northern Cali so dont have to winterize and have never done so before.