Besides searching the internet (with Yahoo "search web" above or Google or one of the other search engines) see what is in your library under "Washington (State) - Description and travel" Dewey 917.95 or just plain "Washington (State)
The best thing is to go there, of course. Your questions about clothing and wealth seem strange. All places have rich, poor and levels in between. There are places where males must wear shirts and shoes (e.g. restaurants, stores, public buildings) and places where they can go shirtless (beaches, their backyards, their vehicles and their fields if they have fields.) just like in other parts of the US. Washington has mountains with glaciers. I would not climb them without wearing at least a shirt.