I live in Edmonds and haven’t done a full close. I do have a winter safety mesh cover and run at lower speed when it gets below freezing. I have a variable speed pump so it helps. Last year I decided to get a cover for my pump and heater as well for the few weeks it actually snowed. I believe it was just outdoor equipment generic winter covers from Amazon. It seemed to work just fine. No issues with opening pool. I was debating on blowing out the lines, covering, anti freeze, but it really doesn’t get below freezing that often and I haven’t had much experience with blowing out lines we decided to just run at low speeds. I went out of town for the holidays one year and had a house sitter run for us no issues! I also have an in-ground fiberglass pool as well.