Bill and Linda, first of all, welcome to the MOC family and congrats on the new 3650RK, you'll love it. Now for the w/d as far as winterizing it, being new, it should be winterized from the dealer in this weather. But if it isn't, get the manual out and follow the instructions, it really is easy to do. You do the w/d the same time you do the rest of the 5er and it takes about an extra gallon to make sure it runs pink! I disconnected the hoses and ran pink thru and added about a quart to the w/d and ran a spin cycle for about 3 minutes. If you have any problem, call your dealer and ask one of the techs to reassure you that you did it right. Enjoy your new Montana!