Eckmann... If you are in Alaska or Colorado for that matter, I would do the full winterization including the use of RV Antifreeze. It will give you peace of mind and when spring rolls around, you won't be surprized by some broken plumbing issues. Use the advanced search box in the upper right hand corner of the page and type in winterization. There are several post and one of them will have all the details you need. It is much more simple to do than it seems when reading the instructions. After you have done it once, you will also understand how all the plumbing is rigged and how it functions. Good Luck!