Welcome to the forum!!!
Might I suggest that although Glass Guy and NJ Hillbilly gave you great tips, that you might also want to try the search engine at the top of the page. There have been a number of discussions on this. Lots of great info out there.
Don't I remember something about releasing the pressure on the city water attachment on outside of the rig? I thought this was discussed quite a bit last fall.
You can tell that Al gives directions on winterizing and I am the gofer, can't cha??
(Hey Glass Guy, how's the color down your way?? Got nice here REAL fast, like in 4 days!)