Replying to University of Washington or CU Boulder?

So I am a junior this year and these two schools are both at the top of my list.  I will most likely be visiting them this fall/early winter but would love to get some insight in comparision to eachother.  I would be looking to go into engineering or a math related field and I know both are pretty solid in those fields.

Just a few questions for both of them

How is the campus?

How is the "vibe" (a lot of snotty kids or a lot of chill kids etc...)?

How is the dorm life/parties/bars?

How is the skiing?

Thanks in advance