I will be storing my Northline Travel Trailer in Mt.Pleasant,SC from the end of January to the end of May. There are a few days when it gets into the 20's and some in the low 30's for a few hours. The highs range from 42-70 F. The coldest times are around 4 AM to 6 AM. The trailer is a four season trailer and water lines are enclosed. I will be draining all tanks a few days before I take the RV into storage. I need to know some opinions on whether to winterize for Feb and March. Since this will be my first time to do this I would like to hear what RV'ers have to say.