I have to agree with Torchy to some extent. Even under cover our wet climate up this way and ESPECIALLY up your way will wreak merry hell with anything made from steel and most other things as well.

All of which means that you'll want to look everything over with a close inspection.

You already mentioned the chain which I'm sure is rusted solid by now or darn near it. Rust on the freewheel (I checked the Norco site and it's a 7speed freewheel) is fine but you'll likely want to lay the wheel on its side and get some oil down into the freewheel bearings and pawls to help things along. Cables may not operate as freely as they did when new. Stainless isn't all that stainless after all when subjected to fairly extreme conditions. If the wheels and steering head all seem to turn silently then fine for now. But at some point if the bike is serving her needs well I'd look at doing a strip, clean and repack with grease to all these points.

Also since the seat post can weld itself into place with corrosion pull it out, clean it off as well as cleaning the inside of the seat post and grease all those parts before putting them back together.

Other than this just clean and wax or grease everything you see depending on if it needs waxing or greasing.