Yup, I winterized my trailer last week. It was pretty simple and took only about 15 minutes now that I know what I'm doing. Fortunately, my mouse proofing has worked beautifully, so I only have to worry about the water system.
We easily drop down to about 15 degrees here in the mountains of Aridzona, so I have to be careful of outside water.
Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew