Hello, we are new pool owners May, 2014. I have seen some posts about winterizing this type of seasonal pool to leave up all winter, but most are a couple years old. We had a very rough winter last year, many 30 below wind chill days. Do you think we can successfully winterize this pool to leave up during our sometimes very harsh winters in NW Illinois? Has anyone in our area or colder done this and if so, how and how long has your pool lasted? Thanks so much.